Nexo Geo M6Bass Manual de usuario

Marca: Nexo

Modelo: Geo M6Bass

Categoría: Equipo de música suplementario

Tipo: Manual de usuario

Este manual también es adecuado para

GEO M6 Series

Geo M620 & Geo M6Bass Tangent Array Modules

User Manual

GEO M6 Series User Manual V1.01

Date: 2014/07/21

Page 2/62 PLEASE READ CAREFULLY BEFORE PROCEEDING

GEO Technology is radically new thinking

The GEO R&D Project has, to date, resulted in the following patent applications:

The GEO Hyperboloid Reflective Wavesource™ differs radically from the megaphone-variant type

horns you know and love (or hate). “Tried and true” methods will produce entirely unexpected results.

HRW technology produces precise and predictable results.

The Configurable Directivity Flange. A waveguide that allows the operator to alter its behaviour. An

unprecedented NEXO development that is easy to use – once you know how and when.

The Directivity Phase Device needs no operator input to function, but it is reassuring to know that the

coupling of the midrange of the system is considered as important as the high frequencies…

DSP-driven Directional Sub-bass devices are a new approach to controlling LF/VLF acoustic energy.

GEO is not hard to use when you understand how…

The technology behind GEO is revolutionary, but it is grounded in years of practical experience with the

problems of delivering high quality professional sound to large audiences at high SPL levels. The GEO

toolbox includes NS-1 - a simple yet powerful and highly predictive design tool. The array assembly

system is keyed to the design software and will easily enable you to deploy your design with great

precision. The NXAMP Amplified Digital TDcontroller provides driver protection and system optimization

as well as DSP-driven cardioid pattern control for the LS and RS series Subwoofers.

GEO is a high precision system

The GEO HRW™ controls acoustic energy more precisely than other multiple element waveguides. It

also makes GEO less forgiving of mistakes. Whilst conventional horns never combine into a coherent

array, they may deliver acceptable results even if the design and deployment of the system is less than

optimal. This is not the case with GEO where careless installation produces catastrophic results.

A GEO Tangent Array is not a “line array”

GEO Technology is equally effective in designing and deploying tangent horizontal arrays or curved

vertical arrays. For best results in a specific application the user needs to know how multi-speaker

arrays interact with audience geometry, along with the benefits and drawbacks of curved vertical arrays

and horizontal arrays.

Curved tangent arrays require different design techniques

For the past 20 years, sound reinforcement professionals have worked with horizontal arrays that use

conventional horns to deliver [more or less] ‘equal power to equal angles’. Curved vertical arrays are

designed to deliver [more or less] equal power to equal areas’. When arrays use conventional horns,

the lack of precision, overlap and interference masks errors in array design and aiming. The highly

precise GEO wavesource responds accurately, consistently and predictably to the design and

deployment of a curved vertical tangent array. This is why the GEO rigging system is designed to

control angular splay to 0.01° precision.

GEO curved tangent arrays require different operational techniques

Over the years, system designers and operators have developed a number of signal processing

techniques to disguise and partly overcome the limitations of horn design. “Frequency shading,”

“amplitude shading,” “system tuning,” all of these are tools of the advanced sound system operator.

NONE OF THESE TECHNIQUES ARE APPLICABLE TO GEO TANGENT ARRAYS. Instead of

enhancing the array’s performance they will severely degrade it.

Take time to learn how to get great results with GEO Technology. It is an investment that will pay off in

more satisfied clients, more efficient operating procedures and more recognition for your skill as a

sound system designer and operator. A comprehensive understanding of GEO theory, tangent arrays,

and specific features of the GEO M6 Series will help you to operate your system at its full potential.

PLEASE READ CAREFULLY BEFORE PROCEEDING Page 3/62

PLEASE READ CAREFULLY BEFORE PROCEEDING

BASIC PRECAUTIONS

Do not open the speaker system or attempt to disassemble the internal parts or modify them in any

way. The speaker system contains no user-serviceable parts. If it should appear to be malfunctioning or

damaged, discontinue use immediately and have it inspected by qualified NEXO service personnel.

Water exposure: Do not expose the speaker system to direct rain, do not use it near water or in wet

conditions. Do not place containers with liquid on speaker system as they might spill into openings. If

any liquid such as water seeps into the speaker system, have it inspected by qualified NEXO personnel.

SYSTEM DEPLOYMENT SAFETY RULES

Read User Manual before deployment. Before use of enclosed speaker system,

please ensure that anyone involved in system deployment understands the rigging –

stacking – pole mounting safety rules as described in the speaker system User Manual.

Failure to do this exposes people to potential injury or death.

Always consult qualified NEXO personnel if the device installation requires construction work and make

sure to observe the following precautions:

Mounting precautions

- choose mounting hardware and an installation location that can support the weight of the speaker

system;

- do not use speaker system handles for suspended installation;

- do not expose speaker system to excessive dust or vibration, or extreme cold or heat to prevent

possibility of component damage;

- do not place the speaker system in an unstable position from which it might fall accidentally;

- if speaker systems uses a stand, ensure that stand specifications are adapted, and that stand

height does not exceed 1.40m/55”; never move the stand while the speaker is in position.

Connection and powering precautions

- remove all connected cables before moving the speaker system;

- turn off AC power of all power amplifier units before connecting the speaker system;

- when turning on the AC power to the audio system, always turn on the power amplifier last; when

turning the AC power off, always turn off the power amplifier first;

- when used in cold conditions, a gradual power ramp up should applied to the system on an 5 mn

period to allow the loudspeaker components to stabilize during the very first minutes of usage.

Inspect the speaker system periodically.

Page 4/62 PLEASE READ CAREFULLY BEFORE PROCEEDING

SAFETY INSTRUCTIONS FOR NEXO TD CONTROLLERS

NEXO ANALOGUE PSTDCONTROLLERS, NX242 DIGITAL CONTROLLER,

NXAMP4x1 AND NXAMP4x4 POWERED CONTROLLERS ARE CLASS 1

APPARATUS AND MUST BE EARTHED.

THE GREEN AND YELLOW WIRE OF THE MAINS CORD MUST ALWAYS BE CONNECTED TO AN

INSTALLATION SAFETY EARTH OR GROUND. THE EARTH IS ESSENTIAL FOR PERSONAL

SAFETY AS WELL AS THE CORRECT OPERATION OF THE SYSTEM, AND IS INTERNALLY

CONNECTED TO ALL EXPOSED METAL SURFACES.

- Read these instructions.

- Keep these instructions.

- Heed all warnings.

- Follow all instructions.

- Do not use this apparatus near water.

- Clean only with dry cloth.

- Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.

- Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus

(including amplifiers) that produce heat.

- Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two

blades with one wider than the other. A grounding type plug has two blades and a third grounding

prong. The wide blade or the third prong are provided for your safety. If the provided plug does not

fit into your outlet, consult an electrician for replacement of the obsolete outlet. (US market)

- Protect the power cord from being walked on or pinched particularly at plugs, convenience

receptacles, and the point where they exit from the apparatus.

- Only use attachments/accessories specified by the manufacturer.

- Unplug this apparatus during lightning storms or when unused for long periods of time.

- Refer all servicing to qualified service personnel. Servicing is required when the apparatus has

been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled

or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does

not operate normally, or has been dropped.

PLEASE READ CAREFULLY BEFORE PROCEEDING Page 5/62

HIGH SOUND PRESSURE LEVELS

Exposure to extremely high noise levels may cause permanent hearing loss.

Individuals vary considerably in susceptibility to noise-induced hearing loss but nearly

everyone will lose some hearing if exposed to sufficiently intense noise for a sufficient

period of time. The U.S. Government’s Occupational and Health Administration (OSHA)

has specified the following permissible noise level exposures: Sound Duration Per

Day In Hours

Sound Level dBA, Slow Response

100

1 ½

102

105

110

¼ or less

115

According to OSHA, any exposure in excess of the above permissible limits could result in some

hearing loss. Ear plugs or protectors to the ear canals or over the ears must be worn when operating

this amplification system in order to prevent permanent hearing loss, if exposure is in excess of the

limits as set forth above. To ensure against potentially dangerous exposure to high sound pressure

levels, it is recommended that all persons exposed to equipment capable of producing high sound

pressure levels such as this amplification system be protected by hearing protectors while this unit is in

operation.

DISPOSAL OF OLD ELECTRICAL & ELECTRONIC EQUIPMENT

This symbol on the product or on its packaging indicates that it shall not be treated

as household waste. Instead it shall be handed over to the applicable collection

point for the recycling of electrical and electronic equipment. By ensuring this

product is disposed of correctly, you will help prevent potential negative

consequence for the environment and human health, which could otherwise be

caused by inappropriate waste handling of this product. The recycling of materials

will help to conserve natural resources. For more detailed information about

recycling of this product, please contact your local city office, your household waste

disposal service or the shop where you purchased the product.

Page 6/62 CONTENTS

CONTENTS

PLEASE READ CAREFULLY BEFORE PROCEEDING .................................................................... 3

CONTENTS......................................................................................................................................... 6

1 INTRODUCTION ......................................................................................................................... 8

2 GEO M6 GENERAL SET-UP INSTRUCTIONS ........................................................................... 9

2.1 SPEAKER CONNECTION .......................................................................................................... 9

GEO M620 connectors ..................................................................................................... 9 2.1.1

GEO M6Bass connectors ................................................................................................. 9 2.1.2

Cabling ............................................................................................................................. 9 2.1.3

3 AMPLIFIER SELECTION FOR USE WITH GEO M6 & LS18 .................................................... 10

3.1 GEO M6 AND NXAMP TDCONTROLLERS ............................................................................. 10

NXAMP connectors ........................................................................................................ 10 3.1.1

GEO M6 and NXAMP4x1 recommended loading ........................................................... 10 3.1.2

4 GEO M6 SETUPS ON NEXO TD CONTROLLERS ................................................................... 11

4.1 NXAMP TDCONTROLLERS .................................................................................................. 11

5 CONNECTION DIAGRAMS ...................................................................................................... 12

5.1 6 X GEO M620 STEREO – 2 X LS18 MONO ON NXAMP4X1 ................................................... 12

5.2 12 X GEO M620 ON NXAMP4X1 ......................................................................................... 13

5.3 3 X GEO M620 STEREO – 3 X GEO M6B STEREO - 2 X LS18 MONO ON NXAMP4X1 ............... 14

5.4 6 X GEO M620 STEREO – 6X GEO M6B STEREO ON NXAMP4X1 .......................................... 15

6 NS-1 SIMULATION SOFTWARE .............................................................................................. 16

7 CONFIGURABLE DIRECTIVITY DEVICE ................................................................................. 17

7.1 INSTALLING & REMOVING GEO’S CONFIGURABLE DIRECTIVITY FLANGES ................................. 17

7.2 WHEN & WHERE TO USE CONFIGURABLE DIRECTIVITY FLANGES ............................................. 18

8 GEO M6 HARDWARE SETUP PROCEDURE .......................................................................... 19

8.1 SAFETY FIRST .................................................................................................................. 19

Flown Systems Safety .................................................................................................... 19 8.1.1

Ground Stacking Safety ................................................................................................. 20 8.1.2

Contacts ......................................................................................................................... 21 8.1.3

8.2 GENERAL DESCRIPTION ....................................................................................................... 22

GEO M6 modules rigging system ................................................................................... 22 8.2.1

GEO M6 “Left” and “Right” configuration ........................................................................ 22 8.2.2

GEO M6 Angle Setting Bar configuration ....................................................................... 23 8.2.3

Accessories and kits....................................................................................................... 24 8.2.4

Described configurations ................................................................................................ 25 8.2.5

WARNINGS ON GEO M6 ACCESSORIES .................................................................... 26 8.2.6

8.3 INSTALLING GEO M6 ........................................................................................................... 26

1 to 3 (maximum) GEO M6 wall mounted ....................................................................... 27 8.3.1

1 to 3 (maximum) Geo M6 ceiling mounted .................................................................... 28 8.3.2

4 to 12 (maximum) GEO M6 ceiling mounted ................................................................. 29

8.3.3

1 to 3 (maximum) GEO M6 pole mounted ...................................................................... 30 8.3.4

1 to 3 GEO (maximum) M6 truss or cable mounted ........................................................ 32 8.3.5

1 to 6 (maximum) GEO M6 stacked on Sub ................................................................... 33 8.3.6

4 to 12 (maximum) GEO M6 flown ................................................................................. 34 8.3.7

8.4 TESTING AND MAINTENANCE OF THE SYSTEM ........................................................................ 37

CONTENTS Page 7/62

9 SYSTEM ALIGNMENT GUIDELINES ........................................................................................ 38

9.1 GEO M6 VERTICAL CLUSTER DESIGN ................................................................................... 38

9.2 STACKED LS18S AND FLOWN GEO M6 ................................................................................. 38

9.3 DRIVING THE LS18S FROM THE AUX SEND ............................................................................ 39

9.4 RECOMMENDED INSTALLATION TOOLS AND EQUIPMENT .......................................................... 39

10 GEO M6 – LS18S SYSTEM CHECK LIST ................................................................................. 41

10.1 ARE THE SPEAKERS PROPERLY CONNECTED AND ANGLED ? .................................................... 41

10.2 FINAL PRE-SOUND CHECK CHECK ........................................................................................ 41

11 TECHNICAL SPECIFICATIONS ................................................................................................ 42

11.1 LS18 SUBWOOFER............................................................................................................... 42

System specifications ................................................................................................. 42 11.1.1

Dimensions ................................................................................................................. 43 11.1.2

11.2 GEO M620 MODULE ............................................................................................................ 44

System specifications ................................................................................................. 44 11.2.1

Dimensions ................................................................................................................. 45 11.2.2

11.3 GEO M6BASS MODULE ........................................................................................................ 46

System specifications ................................................................................................. 46 11.3.1

Dimensions ................................................................................................................. 47 11.3.2

11.4 GEO M6 ACCESSORIES ....................................................................................................... 48

GMT-BUMPER ........................................................................................................... 48 11.4.1

GMT-EXBAR .............................................................................................................. 49 11.4.2

GMT-BPDAPT ............................................................................................................ 50 11.4.3

GMT-LBUMPER ......................................................................................................... 51 11.4.4

GMT-LBPADPT .......................................................................................................... 52 11.4.5

VNT-POLE .................................................................................................................. 53 11.4.1

VNT-XHBRK ............................................................................................................... 54 11.4.2

VNT-TCBRK ............................................................................................................... 55 11.4.3

GMT-IPCOV ............................................................................................................... 56 11.4.1

VXT-BL515 PUSH PINS ............................................................................................. 57 11.4.2

GMT-BNFIX ................................................................................................................ 57 11.4.3

VNI-WS15 ................................................................................................................... 58 11.4.4

GMT-6CASE ............................................................................................................... 59 11.4.5

12 GEO M6 SERIES PARTS & ACCESSORIES LIST ................................................................... 60

12.1 MODULES & CONTROL ELECTRONICS LIST ............................................................................. 60

12.2 ACCESSORIES LIST .............................................................................................................. 60

13 USER NOTES ............................................................................................................................ 62

Page 8/62 INTRODUCTION

1 INTRODUCTION

Thank you for selecting a NEXO GEO M6 Series Tangent Array System.

This manual is intended to provide you with necessary and useful information about your GEO M6

System, which includes the following products:

 GEO M620 is a 20° Tangent Array Module. It

comprises 1x6.5” (17cm) 8 ohms LF/MF driver and

1x1.5” voice coil, 1” Throat 16 Ohm HF Driver loaded

by a 15° Hyperboloid Reflective Wavesource™.

 GEO M6B is a Bass-Mid Reinforcement module for

Geo M620. It comprises 1x6.5” (17cm) 8 ohms LF/MF

driver ™.

 GEO M6 Accessory Range. a full range of

accessories that provides safe, flexible and simple

means of installing Geo M6 as single or multiple units

in fixed installation as well as in touring applications.

 GEO M6 modules are controlled, powered and

monitored by NXAMP4x1.For a complete description

of this controller, please refer to User Manual.

NXAMP DSP algorithms and parameters are fixed in

software and updated regularly: Please consult the

NEXO web site (www.nexo-sa.com) for the latest

software releases.

 NS-1 simulation software assists in the design and

implementation of vertical tangent GEO arrays.

Please consult the NEXO web site (www.nexo-

sa.com) for the latest software releases.

 Available for iPad and iPhone, NEXO NeMo provides

remote control over an NXAMP network from

anywhere in the venue, thanks to an intuitive and

graphically attractive user interface. NeMo is available

on iTunes.

Please devote your time and attention to reading this manual. A comprehensive understanding of GEO

theory, tangent arrays and specific features of GEO M6 will help you to operate your system at its full

potential.

GEO M6 GENERAL SET-UP INSTRUCTIONS Page 9/62

2 GEO M6 GENERAL SET-UP INSTRUCTIONS

2.1 Speaker connection

GEO M620 and M6B are connected with Speakon NL4FC plugs (not supplied). The 4 pins of the 2

Speakon sockets identified in / out are connected in parallel within the enclosure.

Either connector can be used to connect to NXAMP or to link to an additional Geo M6 cabinet.

Therefore, a single 4-conductor cable can connect two NXAMP channels to various Geo M620 and

M6B.

GEO M620 connectors 2.1.1

Connectors are wired as follows:

GEO M6Bass connectors 2.1.2

Connectors are wired as follows:

Cabling 2.1.3

IMPORTANT

Long speaker cables induce capacitive effects – up to hundreds of pF depending on the

quality of the cable - with a low-pass effect on high frequencies. If long speaker cables

must be used, ensure that they do not remain coiled while in use.

Speakon Connector

M620

1(-)



Through

1(+)



Through

2(-)



Geo M620 (-)

2(+)



Geo M620 (+)

Speakon Connector

M620

1(-)



Geo M6Bass (-)

1(+)



Geo M6Bass (+)

2(-)



Through

2(+)



Through

Page 10/62 AMPLIFIER SELECTION FOR USE WITH GEO M6 & LS18

3 AMPLIFIER SELECTION FOR USE WITH GEO M6 & LS18

3.1 GEO M6 and NXAMP TDControllers

NEXO Powered TDControllers NXAMP 4X1 is an integrated solution for Control and amplification for all

NEXO speaker ranges.

NXAMP4x1 power capability is listed in the table below:

Mode

4 Channels

Bridge Stereo

NXAMP4x1

4 x 600 Watts / 8 Ohms

4 x 900 Watts / 4 Ohms

4 x 1300 Watts / 2 Ohms

2 x 1800 Watts / 8 Ohms

2 x 2600 Watts / 4 Ohms

NXAMP connectors 3.1.1

NXAMP4x1 rear panels features:

- 4 analog inputs / outputs (links) on XLR3 connectors;

- 4 digital inputs / outputs on RJ45 connectors with a slot for optional NX-ES104 (EthersoundTM) or NX-

DT104 (DanteTM) cards;

- 4 speaker level outputs on NL4FC connectors.

Figure below shows connectors implementation on the rear panel.

GEO M6 and NXAMP4x1 recommended loading 3.1.2

Passive Mode

3 x GEO M620

1 channel of NXAMP4x1 in 4 channels mode

3 x GEO M6Bass

1 channel of NXAMP4x1 in 4 channels mode

GEO M6 SETUPS ON NEXO TD CONTROLLERS Page 11/62

4 GEO M6 SETUPS ON NEXO TD CONTROLLERS

4.1 NXAMP TDControllers

As of this manual printing date, load 3.22 features the setups listed in below table in the “NEXO

configurations” menu.

NEXO recommended setups

CH1

CH2

CH3

CH4

'M620-LS18 120Hz'

'1-3 Boxes'

LS18 (bridged with CH2)

N/A

M620

'M620-LS18 120Hz'

'4-12 Boxes'

LS18 (bridged with CH2)

N/A

M620

'M620-70Hz'

'4 Ch. 1-3 Boxes'

M620

'M620-70Hz'

'4 Ch. 4-12 Boxes'

M620

'M620-120Hz'

'4 Ch. 1-3 Boxes'

M620

'M620-120Hz'

'4 Ch. 4-12 Boxes'

M620

- Setups “1-3 Boxes” are to be used in small configuration (pole stand, lip fill, under-balcony);

- Setups “4-12 Boxes” are to be used in larger arrays – typically flown;

- Frequency value is high-pass filter cut-off point.

Additionally, “Custom configurations menu” allows to build any combination of NEXO speakers –

including GEO M6Bass with:

- Full phase compatibility from 20 Hz to 20kHz.

- Choice between 85 Hz and 120 Hz X-over point between Nexo LS or RS subwoofers and Geo M6.

NEXO Custom setups

M620 4-12 BOXES 70Hz-20kHz

M620 4-12 BOXES 85Hz-20kHz

M620 4-12 BOXES 120Hz-20kHz

M620 1-3 BOXES 70Hz-20kHz

M620 1-3 BOXES 85Hz-20kHz

M620 1-3 BOXES 120Hz-20kHz

M6B 70Hz-180Hz

M6B 85Hz-180Hz

Please consult www.nexo-sa.com for upgrade releases.

Page 12/62 CONNECTION DIAGRAMS

5 CONNECTION DIAGRAMS

5.1 6 x GEO M620 stereo – 2 x LS18 mono on NXAMP4x1

Channels 1 & 2 are bridge mono for 2xLS18, channel 3 & 4 drive 3 GEO M620 each

CONNECTION DIAGRAMS Page 13/62

5.2 12 x GEO M620 on NXAMP4x1

Each NXAMP4x1 channel drives 3 GEO M620

Page 14/62 CONNECTION DIAGRAMS

5.3 3 x GEO M620 stereo – 3 x GEO M6B stereo - 2 x LS18 mono on NXAMP4x1

Channels 1 & 2 are bridge mono for 2xLS18, channel 3 drives 3xGEO M6Bass, channel 4 drives 3x

GEO M620.

CONNECTION DIAGRAMS Page 15/62

5.4 6 x GEO M620 stereo – 6x GEO M6B stereo on NXAMP4x1

Channels 1 & 3 drive 3xGEO M6Bass each, channels 2&4 drive 3xGEO M620 each.

Page 16/62 NS-1 SIMULATION SOFTWARE

6 NS-1 SIMULATION SOFTWARE

NS-1 software is a R&D simulation tool derived application. It processes measured speaker data with

complex mathematical algorithms to assist the user in optimizing system design. Due to the complexity

of the interaction of multiple cabinets, it is simply not possible to reliably design curved vertical arrays

without using the processing power of a computer to predict the optimum array structure for a given

audience geometry. The design logic is far more complex than looking at a section drawing of the

venue, measuring the overall angle needed to cover the audience from the cluster location, and dividing

by 20 degrees to determine the required amount number of GEO M620 cabinets.

NS-1 is an easy to use tool that allows to shape the energy leaving the cluster to fit the audience. It

predicts pressure levels radiated from the system to ensure enough cabinets are provided for the

application, as well as mechanical constraints for safe flown systems.

In addition, it provides mechanical information for all clusters in agreement with Structural Analysis

Reports (available in the Help section): dimensions, weight, gravity center position, forces, moments,

working load and safety factor.

NS-1 installation package includes all NEXO User Manuals, Structural Analysis Reports and Certificates

PDF files (which can be found in the last section of User Manuals).

NS-1 is a freeware available on www.nexo-sa.com

IMPORTANT

Never install a GEO M6 cluster without checking its acoustical performances and

mechanical safety in NS-1 prior to installation.

Any question or bug report please contact techn[email protected]

NS-1 GEO M6 ACOUSTIC PAGE

CONFIGURABLE DIRECTIVITY DEVICE Page 17/62

7 CONFIGURABLE DIRECTIVITY DEVICE

The GEO Wavesource controls dispersion of acoustic energy using an hyperboloid acoustical reflector

in the vertical plane and a diffraction slot in the horizontal plane. The patented Configurable Directivity

Device consists of bolt-on flanges that alter the diffraction slot’s exit flare rate thus increasing the

horizontal coverage from 80° to 120°.

7.1 Installing & removing GEO’s Configurable Directivity flanges

GEO M620 are shipped in the 80° dispersion configuration;

120° flanges is an optional accessory.

To change dispersion in the non-coupling plane to 120°:

- Remove the front grill (TORX15, drawings below);

- Remove the 2 TORX screws per flange on each side of the GEO Waveguide (drawings below);

- Install the 120° flanges with the 2 TORX screws

- Re-install the grid, being careful that the NEXO logo must be on the woofer side.

REMOVING THE GRILL ADDING THE 120° FLANGES

Page 18/62 CONFIGURABLE DIRECTIVITY DEVICE

7.2 When & where to use Configurable Directivity flanges

The diagrams show audience area coverage for a stereo system. While a GEO cluster will deliver even

SPL from the front to the rear of this audience area, there are “holes” near the front in the centre and at

the outside edges. We cannot fill the outside coverage gaps without enlarging the centre gap, and vice

versa (left figure below).

If 120° Configurable Directivity Devices are installed at the bottom cabinet of the clusters, coverage will

look more like the pattern in right figure below.

-6dB coverage, all GEO M620 in 80° configuration

-6dB coverage, bottom GEO M620 in 120° configuration

In curved vertical arrays, the 120° Configurable Directivity Device can be used:

- On the bottom row of curved vertical arrays, to fill in coverage gaps in the front rows.

- On all rows of curved vertical arrays, in cases where 120° of horizontal coverage is preferred to 80°.

GEO M6 HARDWARE SETUP PROCEDURE Page 19/62

8 GEO M6 HARDWARE SETUP PROCEDURE

Before proceeding with assembly of GEO M6 arrays, please ensure that the components are present

and undamaged. A component list is appended to this manual. In the event of any shortage, please

contact your supplier.

For maximum efficiency the GEO M6 rigging system requires three experienced persons for set-up:

typically one motor hoist operator, and one operator per side of the array. Good synchronisation and

crosscheck between the operators are key elements for a reliable and safe set-up.

8.1 SAFETY FIRST

GEO M6 Rigging System structural computations and related documents are available in NS-1 or at

NEXO ([email protected]) upon request.

We include this section to remind you of safe practice when flying the GEO M6 system. Please read it

carefully. However, user must always apply his or her knowledge, experience and common sense. If in

any doubt, seek advice from your supplier or NEXO agent.

This manual offers guidance only for GEO M6 loudspeaker systems. References in this manual to other

rigging equipment such as motor hoists, steels, shackles etc. are made to clarify the description of

rigging procedures. The user must ensure that operators are properly trained by other agencies in the

use of these items.

The GEO M6 Rigging System has been optimised for the deployment of curved vertical or horizontal

tangent arrays of GEO M6 loudspeakers. Angle adjustment between cabinets has been limited to

specific settings to ensure correct acoustic coupling.

The GEO M6 Rigging System is a professional precision tool set, and should be handled with extreme

care. Only persons who are fully conversant with the operation of the GEO M6 Rigging System and

provided with suitable safety equipment should deploy GEO Arrays. Misuse of the GEO M6 Rigging

System could lead to dangerous consequences.

Used and maintained correctly, the GEO M6 Rigging System will give many years of reliable service in

portable systems. Please take the time to read and understand this manual. Always use NS-1 to

determine the optimum angle settings for a particular venue, hang point and curved vertical GEO M6

cluster. Applied forces and moments are strongly cabinet quantity and angle configuration dependent.

Cluster configuration must be implemented and validated in NS-1 prior to installation.

Flown Systems Safety 8.1.1

Always inspect all the rigging components and cabinets for damage before assembly. Pay special

attention to the lifting points, and safety clips. If you suspect that any of the components are damaged

or defective, DO NOT USE THE AFFECTED PARTS. Contact your supplier for replacements.

Read this manual carefully. Also be familiar with the manuals and safe working procedures for any

ancillary equipment that will be used with the GEO M6 Rigging System.

Applied forces and moments are strongly cabinet quantity and angle configuration dependent. Cluster

configuration must be implemented and validated in NS-1 prior to installation.

Ensure that all local and National regulations regarding the safety and operation of flying equipment are

understood and adhered to. Information on these regulations can usually be obtained from Local

Government Offices.

When deploying a GEO M6 system always wear protective headwear, footwear and eye protection.

Do not allow inexperienced persons to handle a GEO M6 system. Installation personnel should be

trained in loudspeaker flying techniques and should be fully conversant with this manual.

Page 20/62 GEO M6 HARDWARE SETUP PROCEDURE

Ensure that motor hoists, hoist control systems and ancillary rigging components are currently certified

as safe and that they pass a visual inspection prior to use.

Ensure that public and personnel are not allowed to pass beneath the system during the installation

process. The work area should be isolated from public access.

Never leave the system unattended during the installation process.

Do not place any object, no matter how small or light, on top of the system during the installation

procedure. The object may fall when the system is flown and is likely to cause injury.

Secondary safety steels must be installed once the system has been flown to the operating height.

Secondary steels must be fitted irrespective of requirements of the local safety standards applicable to

the territory.

Ensure that the system is secure and prevented from pivoting around the motor hoist.

Avoid any form of excessive dynamic loading to the assembly (structural computations on GEO M6

Rigging System are based on a 1/1.2 factor for hoist or motor acceleration).

NEVER attach any item to the GEO M6 system other than the GEO M6 accessories.

When flying outdoor systems, ensure that the system is not exposed to excessive wind or snow loads

and is protected from rainfall.

If wind velocity reaches or exceeds Beaufort 7 (60 km/h – 38 mp/h), the system must be landed.

The GEO M6 Rigging System requires regular inspection and testing by a competent test centre. NEXO

recommend that the system is load tested and certified annually or more frequently if local regulations

require.

When de-rigging the system ensure that the same duty of care is given to the procedure as for the

installation. Pack GEO M6 components carefully to prevent damage in transit.

Ground Stacking Safety 8.1.2

Statistically, many more injuries occur due to unstable ground stacked PA systems than those

associated with flown systems. There are several reasons for this fact, however the message is clear:

Always survey the supporting structure upon which a ground stack is to be built. Always look beneath

PA wings to inspect the deck support and if necessary ask for the stage scrims and dressings be

removed to allow access.

If the stage surface slopes, as it does in some theatres, ensure that the system is prevented from sliding

forwards due to vibration. This may require the fitting of timber battens to the stage floor.

For outdoor systems ensure that that the system is protected from wind forces which might cause the

ground stack to become unstable. Wind forces can be huge, especially upon large systems, and should

never be underestimated. Observe meteorological forecasts, calculate the “worst case” effect upon the

system prior to erection and ensure that the system is secured appropriately.

Take care when stacking cabinets. Always employ safe lifting procedures and never attempt to build

stacks without sufficient personnel and equipment.

Never allow anyone, whether operators, artists or members of the public to climb onto a ground stacked

PA system. Anyone who needs to climb over 2m (6 ft) high should be fitted with suitable safely

equipment including a clip-on harness. Please refer to local Health and Safety legislation in your

territory. Your dealer can help with advice on access to this information.

Apply the same attention to all safety matters when de-stacking systems.

Be aware that safety procedures are as important in the truck and in the warehouse as they are at the

venue.

GEO M6 HARDWARE SETUP PROCEDURE Page 21/62

Contacts

8.1.3

Correct training is fundamental to safe practise when working with loudspeakers flying systems. NEXO

recommend that users contact local industry associations for information on specialist course.

Information for International training agencies can be obtained by contacting either:

The Production Services Association

(PSA),

School Passage,

Kingston-upon-Thames,

KT1 SDU Surrey,

ENGLAND

Telephone: +44 (0) 181 392 0180

Rigstar Training and Testing Center

82 Industrial Dr. Unit 4

Northampton, Massachusetts

01060 U.S.A.

Phone: 413-585-9869 -- Fax: 413-585-

9872

[email protected]

ESTA

Entertainment Services & Technology Association

875 Sixth Avenue, Suite 1005

NEW YORK, NY 10001 USA

Phone: 212-244-1505 – Fax: 212-244-1502

[email protected] - www.esta.org

Page 22/62 GEO M6 HARDWARE SETUP PROCEDURE

8.2 General Description

GEO M6 modules rigging system 8.2.1

GEO M620 GEO M620Bass

GEO M6BASS and GEO M620 feature a 3 point rigging system, 2 for front connection, and 1 for rear

connection and angle splay settings.

Angle splay setting sequence is: 0.5° - 2° - 5° - 10° - 15° - 20°

Below drawings show rear connecting bar configuration according to “left” or “right” configuration.

GEO M6 “Left” and “Right” configuration 8.2.2

GEO M6 can be installed “Left” or “Right” :

- “Left” means HF waveguide is left as seen from front

- “Right” means HF waveguide is right as seen from front.

GEO M6 can be connected to bumpers “Left” or “Right” by simply flipping the cabinets.

Whenever possible, NEXO recommends symmetrical designs (preferably NEXO logo

outwards and HF waveguide inwards in stereo configurations)

GEO M620 “Left” Geo M620 “Right”

GEO M6 HARDWARE SETUP PROCEDURE Page 23/62

GEO M6 Angle Setting Bar configuration

8.2.3

GEO M6 angle setting bar connects 2 x GEO M6 with 2 x VXT-BL515. It can be set upwards or

downwards or removed on user’s choice (independently from “Left” and “Right” configuration):

- If the angle settings bars are set downwards, it will have to be removed from cluster bottom cabinet

- If angle setting bars are set upwards, it will have to be removed when attached to GMT-LBUMP

In order to avoid misuse or wrong angle setting by confusing left and right printings on GEO M6,

remember that:

- The cabinet articulation hole around which angle setting bar rotates is always the one with no angle

value indication

- The cabinet angle setting hole along which angle setting bar slides is always next to the “0°”

indication

- The angle reading values are defined by the printing on the same side.

Page 24/62 GEO M6 HARDWARE SETUP PROCEDURE

Accessories and kits

8.2.4

Geo M6 accessories are:

GMT-BUMPER GMT-EXBAR GMT-LBUMP

(up to 12xGeo M6 max) (up to 3xGeo M6 max)

GMT-LBPADPT GMT-BPADPT VNT-POLE

GMI-BNFIX GMI-IPCOV GMT-6CASE

VNI-WS15 VNT-TCBRK VNT-XHBRK

Please refer to sections 11 and 12 of this manual for more information on above references

GEO M6 HARDWARE SETUP PROCEDURE Page 25/62

Described configurations

8.2.5

FIX INSTALLATION APPLICATIONS

TOURING APPLICATIONS

SECTION 8.3.1

1 to 3 GEO M6 WALL MOUNTED

SECTION 8.3.2

1 to 3 GEO M6 CEILING MOUNTED

SECTION 8.3.3

4 to 12 GEO M6 CEILING MOUNTED

SECTION 8.3.4

1 to 3 GEO M6 POLE MOUNTED

SECTION 8.3.5

1 to 3 GEO M6 TRUSS MOUNTED

SECTION 8.3.6

1 to 6 GEO M6 STACKED ON SUB

SECTION 8.3.7

3 to 12 GEO M6 FLOWN

Page 26/62 GEO M6 HARDWARE SETUP PROCEDURE

WARNINGS ON GEO M6 ACCESSORIES 8.2.6

WARNING 1

All GEO M6 Accessories are specifically rated in agreement with structural

computations.

Never use other accessories – including push-pins - when assembling GEO M6

cabinets than the ones provided by NEXO: NEXO will decline responsibility over the

entire GEO M6 accessory range if any component is purchased from different supplier.

WARNING 3

All GEO M6 accessories have been designed so that cabinets are arrayed vertically.

GEO M6 horizontal assemblies as shown in figure below- are UNSAFE and STRICTLY

PROHIBITED.

NO YES

8.3 Installing GEO M6

IMPORTANT

In order to prevent screws from getting loose in fixed installations, use blocking liquid

LOCTITE

243 or equivalent for all screws used with GEO M6 fixed installation

accessories.

LOCTITE

243 is available at NEXO or at your local distributor upon request.

GEO M6 HARDWARE SETUP PROCEDURE Page 27/62

1 to 3 (maximum) GEO M6 wall mounted 8.3.1

Required items

- 1 x VNI-WS15

- 1 x GMT-LBUMP

- 1 to 3 GMT-BNFIX

- 3 x 12mm diameter screws (not provided)

IMPORTANT

Ensure that the wall is strong enough to hold GEO M6 cluster weight and that the 12

mm diameter screws and corresponding plugs required to fix the VNI-WS15 on the wall

are properly dimensioned.

Procedure

- 3 x 12mm diameter screws (not provided) are required to fix the VNI-WS15 support to the wall;

- Connect GMT-LBUMP to top cabinet by inserting the GMT-BNFIX axis through front holes and

secure axis and rear link with GMT-BNFIX screws;

- Connect subsequent cabinets with appropriate inter-angle values;

- Connect the VNI-WS15 suspension plate to the GMT-LBUMP by using the M6x20 screws provided

with the GMT-LBUMP

NB: please do not use the screws supplied with VNI-WS15, too long for this application case

- Position the 6x20 screws in the oblong hole so that required vertical angle is obtained

- Secure the screws with Loctite 243 or equivalent

- Suspend to the wall suspension using the shoulder screws supplied with VNI-WS15

- Secure the assembly with the VNI-WS15 safety cable

- Adjust horizontal angle

Page 28/62 GEO M6 HARDWARE SETUP PROCEDURE

1 to 3 (maximum) Geo M6 ceiling mounted 8.3.2

Required items

- 1 x GMT-LBUMP

- 1 to 3 x GMT-BNFIX

- 4 x 8mm diameter screws (not provided)

IMPORTANT

Ensure that the ceiling is strong enough to hold GEO M6 cluster weight and that the

four screws 8 mm diameter and corresponding plugs required to fix the GMT-LBUMP

under the ceiling are properly dimensioned.

Procedure

- 4 x 8mm diameter screws (not provided) are required to fix the GMT-LBUMP to the ceiling;

- Connect GMT-LBUMP to top cabinet by inserting the GMT-BNFIX axis through front holes and

secure axis and rear link with GMT-BNFIX screws;

- Connect subsequent cabinets with GMT-BNFIX at required inter-angle values;

NB: please note that top cabinet angle will be -10° in relation to the L-bumper

GEO M6 HARDWARE SETUP PROCEDURE Page 29/62

4 to 12 (maximum) GEO M6 ceiling mounted 8.3.3

Required items

- 1 x GMT-BUMPER

- 4 to 12 x GMT-BNFIX

- 4 x 8mm diameter screws (not provided)

IMPORTANT

Ensure that the ceiling is strong enough to hold GEO M6 cluster weight and that the

four screws 8 mm diameter and corresponding plugs required to fix the bumper under

the ceiling are properly dimensioned.

Procedure

- 8mm diameter screws (not provided) are required to fix the GMT-BUMPER to the ceiling;

- Connect the bumper to top cabinet by inserting the GMT-BNFIX axis through front holes and secure

axis and rear link with GMT-BNFIX screws;

- Connect subsequent cabinets with GMT-BNFIX at required inter-angle values;

NB: please note that top cabinet angle will be 0° in relation to the bumper

Page 30/62 GEO M6 HARDWARE SETUP PROCEDURE

1 to 3 (maximum) GEO M6 pole mounted

8.3.4

Required items

- 1 VXT-PLSTD or 1 Speaker Stand 35mm diameter

- 1 x GMT-LBUMP

- 1 x GMT-LBADPT

- 1 x VNT-POLE

- 3 x VXT-BL515 for first GEO M6

- 4 x VXT-BL515 for second and third GEO M6

IMPORTANT (SPEAKER STAND)

- Speaker stand must be rated for assembly weight (30kg rated load min);

- Speaker stand must always be installed on a horizontal surface;

- Stand height and footprint must be defined to prevent assembly from collapsing;

- Ensure that public is not allowed within a safety area which radius is equal or higher

than assembly height.

IMPORTANT (NEXO SUB POLE STAND)

- NEXO VXT-PLSTD pole stand only should be used for mounting on top of NEXO SUB

- NEXO SUB must always be installed on a horizontal surface;

- Ensure that public is not allowed within a safety area which radius is equal or higher

than assembly height.

GEO M6 HARDWARE SETUP PROCEDURE Page 31/62

Procedure

- Attach the GMT-LBADPT to the GMT-LBUMPER by using the screws, washers and bolts provided

with GMT-LBDAPT;

- Use the 2 pins provided with VNT-POLE to attach L-BUMP at required vertical angle, according to

below drawings;

Bottom Geo M6 at 0° Bottom Geo M6 at -5° Bottom Geo M6 at -10°

NB: above connection configurations are designed for assembly gravity center being aligned with pole

axis, ensuring maximum safety.

IMPORTANT

Ensure that 8mm pins are properly locked in VNT-POLE

- Connect bottom cabinet to GMT-LBUMP with 3 x VXT-BL515 quick release pins

- Lift assembly on speaker stand or on LS18 with VXT-PLSTD pole stand.

- Connect subsequent cabinets at required inter-angle values with 4 x VXT-BL515 quick release pins

IMPORTANT

Ensure that pins are properly locked into Geo M6

Page 32/62 GEO M6 HARDWARE SETUP PROCEDURE

1 to 3 GEO (maximum) M6 truss or cable mounted 8.3.5

Required items

- 1 x GMT-LBUMP

- 1 x GMT-LBADPT

- 1 x VNT-TCBRK (truss mounting) or 1 x VNT-XHBRK (cable mounting)

- 3 x VXT-BL515 for first GEO M6

- 4 x VXT-BL515 for second and third GEO M6

IMPORTANT

Ensure that suspension point is strong enough to hold GEO M6 cluster weight (35 kg)

Procedure

- Attach the GMT-LBADPT to the GMT-LBUMPER by using the screws, washers and bolts provided

with GMT-LBADAPT;

- Connect top cabinet to GMT-LBUMP with 3 x VXT-BL515 quick release pins

- Connect subsequent cabinets at required inter-angle values with 4 x VXT-BL515 quick release pins

- Connect truss clamp VNT-TCBRK or ring clamp VNT-XHBRK to GMT-LBADAPT by inserting 8x45

quick release pin in required holes for proper vertical aiming

IMPORTANT

Ensure that the 8mm pin is properly locked in GMT-LBADPT, and that 5mm pins are

properly locked into GEO M6

- Lift and position assembly, lock and secure clamp on rigging point.

GEO M6 HARDWARE SETUP PROCEDURE Page 33/62

1 to 6 (maximum) GEO M6 stacked on Sub 8.3.6

Required items

- 1 x GMT-BUMPER

- 1 x GMT-BPADPT

- 4 VXT-BL515 per GEO M6

IMPORTANT

GMT-BPADPT is rated for a maximum of: 6xGEO M6s on a single LS18 in any inter

cabinet angle configuration, provided the stack is assembled according to below rules:

- LS18 must always be installed on a horizontal surface;

- Ensure that public is not allowed within a safety area which radius is equal or higher

than assembly height.

- It is highly recommended to secure the system to a fix point located at the back of the

stack.

Procedure

- Connect GMT-BPADPT poles stand adaptor to GMT BUMPER using provided clevis pin; secure pin

with “R” clip

- Stack GMT-BUMPER on top of LS18 by inserting GMT-BPADPT into LS18 pole mount hole

- Connect bottom cabinet to GMT-BUMPER at required vertical angle with 4 x VXT-BL515 quick

release pins

NB: please note that bottom cabinet angle can be adjusted from -7° to 0° in relation to LS18

- Connect subsequent cabinets at required inter-angle values with 4 x VXT-BL515 quick release pins

IMPORTANT

Ensure that the clevis pin is properly locked in GMT-BBADPT, and that 5mm pins are

properly locked into GEO M6

Page 34/62 GEO M6 HARDWARE SETUP PROCEDURE

4 to 12 (maximum) GEO M6 flown 8.3.7

Required items

- 1 or 2 hoists (not provided).

- 1 x GMT-BUMPER

- 1 x GMT-EXBAR for extended positive and negative bumper angles

- 4 VXT-BL515 per GEO M6

- 1 x GMT-6CASE for 6 x GEO M6

IMPORTANT

Maximum GEO M6 quantity for flown vertical cluster is 12 (and eventually less).

Please check NS1 for mechanical Safety Working Load and acoustic computations.

IMPORTANT

Motor hoist must be rated to support entire cluster weight. Please check configuration

in NS1 for proper motor hoist rating

Procedure with flight case set vertically

- Tip the flight case vertically

- Remove upper cover to access to top cabinet rigging points

- Connect GMT-BUMPER to top cabinet 4 x VXT-BL515 quick release pins

- If required, connect GMT-EXBAR to GMT-BUMPER by inserting EXBAR clevis pins into GMT-

BUMPER “B” and “D” holes

- Connect single hoist to required hole as indicated in NS1 design

o “A”, “B”, “C”, “D” or “E” on GMT-BUMPER

o Or “1” to “9” if using GMT-EXBAR

o If using 2 hoists, connect these using extreme points

(“A” and “E”, or “A” and “9” or “”9” and “E”)

GMT-BUMPER and GMT-EXBAR referenced rigging points

IMPORTANT

Ensure hoist hook(s) is (are) properly secured to GMT-BUMPER

GEO M6 HARDWARE SETUP PROCEDURE Page 35/62

- lift assembly to sufficient height in order to connect additional set GEO M6 if required

- set inter-angle values as described in section 8.2.3

IMPORTANT

Ensure all pins are properly locked into Geo M6

- lift cluster to NS-1 defined rigging height, secure cluster horizontally to prevent it from rotating

- Secure bumper with secondary safety steel.

IMPORTANT

The requirements for secondary safety systems vary with territories. However, the

secondary safety steel MUST have a SWL equivalent or greater than that of the rigging

system.

Page 36/62 GEO M6 HARDWARE SETUP PROCEDURE

Procedure with flight case set horizontally

- Open upper cover while the flight case is on its wheels

- Connect GMT-BUMPER to top cabinet 4 x VXT-BL515 quick release pins

- If required, connect GMT-EXBAR to GMT-BUMPER by inserting EXBAR clevis pins into GMT-

BUMPER “B” and “D” holes

- Connect single hoist to required hole as indicated in NS1 design

o “A”, “B”, “C”, “D” or “E” on GMT-BUMPER

o Or “1” to “9” if using GMT-EXBAR

o If using 2 hoists, connect these using extreme points

(“A” and “E”, or “A” and “9” or “”9” and “E”)

GMT-BUMPER and GMT-EXBAR referenced rigging points

IMPORTANT

Ensure hoist hook(s) is (are) properly secured to GMT-BUMPER

- Start lifting bumper and position angle setting pins at required value as described in section 8.2.3

- Attach second set of 6 x GEO M6 to the first set by bring the second GEO M6 flight case adjacent

to the first one, carry on lifting bumper and set inter-angle values for the second set of GEO M6

IMPORTANT

Ensure all pins are properly locked into Geo M6

- Lift cluster to NS-1 defined rigging height, secure cluster horizontally to prevent it from rotating

- Secure bumper with secondary safety steel.

IMPORTANT

The requirements for secondary safety systems vary with territories. However, the

secondary safety steel MUST have a SWL equivalent or greater than that of the rigging

system.

GEO M6 HARDWARE SETUP PROCEDURE Page 37/62

8.4 Testing and Maintenance of the system

General: Geo is a precision piece of equipment and requires regular attention to maintenance in order

to give long and reliable service.

Rigging

NEXO recommends regular testing of loudspeaker rigging components, preferably using a suitable test

rig coupled with a visual inspection.

Fasteners: there are several critical points in the LS18 and GEO M6 cabinets.

Of primary concern are:

a) The grid screws attaching the grid to the cabinet

b) The machine screws attaching the connecting plates to the cabinet.

c) The screws attaching the directivity flanges to the front of the cabinet.

These fasteners should be regularly checked and tightened as necessary.

Cleaning: The exterior of the cabinet and the rigging system can be cleaned with a damp cloth soaked

in mild soapy water. On no account use solvent based cleaners , which may damage the finish of the

cabinet

After cleaning, the rigging system must be treated with a suitable lubricant to prevent rusting. NEXO

recommends the use of Scottoil FS365 which is a water-based lubricant with a mixture of machine oil,

surfactant and anti-rust treatment.

Acoustics

NEXO recommends periodical check of impedance and frequency response by using FFT analyse

software such as Systune, Smaart, WinMLS or equivalent.

Page 38/62 SYSTEM ALIGNMENT GUIDELINES

9 SYSTEM ALIGNMENT GUIDELINES

The NXAMP’s factory delay presets are optimised to provide the best possible crossover between the

GEO M6 and LS or RS Subwoofers systems. The reference point for this adjustment is the front of each

cabinet. (This means that the internal delays needed to achieve a correct time alignment are set for

cabinets standing next to each other with both fronts aligned). We recommend that the system is

adjusted so that arrivals from GEO M6 and LS or RS subwoofers are coincident at a fairly distant

listening position.

9.1 GEO M6 Vertical Cluster design

Cluster design must be done with NS-1, which provides very intuitive and fast method to determine all

cluster geometry parameters in relation to venue where cluster is implemented.

NS-1 is a freeware available for all Nexo users. Please contact your local distributor for

licensing procedure.

IMPORTANT

Never install a GEO M6 cluster without checking its acoustical performances and

mechanical safety in NS-1 prior to installation.

Please contact your local distributor for assistance and/or training NS-1

9.2 Stacked LS18s and Flown GEO M6

In the example below, r

being the distance from GEO M6 array to listener position, and r

being the

distance from LS18 to listener position, the distance difference is then r

–r

(specified meters or feet).

> r

, the delay should be set on the LS18 NXAMP TDcontroller channel.

< r

, the delay should be set on the GEO M6 NXAMP TDcontroller channel

To convert the result in time delay (specified in seconds), apply:

t = (r

-r

)/C r

and r

in meters, C (sound speed)  343 m/S.

Set the units to meters, feet or seconds according to your preference). Delay will have to be adjusted

according to the distance difference r

–r

(see figure below).

SYSTEM ALIGNMENT GUIDELINES Page 39/62

9.3 Driving the LS18s from the AUX send

It is quite common to use the AUX send of a mixing desk to drive the Sub section of a PA system. This

gives the mixing engineer more flexibility to set the level of the sub bass relative to the main PA, apply

special effects, or to use a different EQ on the Sub. However, it also raises some serious issues for the

performance & safety of the system (mostly time alignment).

At NEXO, great care is taken to design optimum phase alignment from one octave above to one octave

below the crossover frequency point. By doing so, drivers are working perfectly together and providing

the best efficiency possible. It is then up to the user to adjust the delay on the NXAMP to match the

physical path difference of the different systems. It is thus possible to get a well-adjusted system, even

without measuring instruments.

If LS18s are driven form an AUX output, NXAMPs are fed with two signals coming from different

sources. If those two sources (MAIN output & AUX send) are not exactly in phase, delay is introduced

into the crossover between the GEO M6 array and the LS18s. It is then mandatory to use proper

measurement tool to optimize phase response.

Why is it unlikely that AUX and MAIN outputs have the same phase?

 Signal paths are likely to be different; any filter modifying the bandwidth and EQ of the

signal is also affecting the phase.

Example: a 24dB/oct high pass filter set at 15Hz is affecting amplitude of the signal by only

0.6dB at 30Hz, but the phase shift is 90°!! At 100Hz we can still measure 25° of phase shift.

 Limiting bandwidth with a low pass filter can introduce a phase difference of up to 180°

(completely out of phase) at the cross over point.

 If the signal is passing through any digital equipment, between 1.4ms and 2.2ms is being

added (around 70° phase shift at 100Hz) due solely to the converter delay! The additional

delay due to the processing itself (look ahead compressor, delay…) can be quite important

as well.

If both outputs are not measured in the actual configuration, it is very likely that phase alignment will not

be correct.

Consequences of badly aligned systems

Mis-aligned systems have lower efficiency: i. e. for the same SPL the system will have to be driven

harder, activating the displacement & temperature protection at lower output levels. Both sound quality

and reliability will decrease as the system is stressed.

Precautions & Checks

Before using the AUX of a mixing desk, ensure that MAIN and AUX outputs are in phase;

Always apply identical EQ or processing on both channels, so that the phase relationship will not be

altered;

Never add additional low pass filtering on the SUB or high pass filtering on the main system;

Inverting polarity on one channel should always result in a massive difference near the crossover point.

If that is not the case, the system is no longer aligned.

9.4 Recommended installation tools and equipment

Tape measure – should be 30m/100ft in length and be of durable fibre material. Have one per array

available to speed up the installation process.

Laser Inclinometer – For measuring vertical and horizontal angles in the venue. An ideal product is the

Calpac ‘Laser projecting a dot’ version which costs approximately 60 €.

Spirit level – used to ascertain the trueness of the surface from which the angle measurements

originate.

Page 40/62 SYSTEM ALIGNMENT GUIDELINES

Rangefinder measuring device – either a Disto type laser measure or an optical laser rangefinder can

be used. Devices such as the Bushnell ‘Yardage Pro’ sports rangefinders provide sufficiently accuracy

and are easy to use. They have the additional advantage of working very well in bright sunlight.

Electronic calculator with trigonometric functions to calculate the height from ground level to points in

the room. The formula to calculate height of a point from measured angle and distance is:

Height of point = Sin(vertical angle in degrees) x distance to point

NB: Take care when using spreadsheets as they calculate using radians by default. To convert degrees

to radians use the formula:

Angle (in radians)=3.142 x Angle (in degrees)/180

Computer – Laptop or Desktop PC running Windows XP with the current version of NEXO NS-1

installed. It is not possible to configure a Geo tangent array properly without using NS-1. Note that,

when NS-1 designs are prepared prior to arrival at the venue, it is often necessary to modify or update

the design to accommodate special circumstances. A PC is absolutely essential to make such changes.

Audio Analysis Software – recommended but not absolutely essential, programs such as Easera

Systune, Smaart, WinMLS enable rapid and detailed analysis of the installation. Consider taking a

training course in using one of these tools if you are not already competent with them – it will pay

dividends in increased performance of the system.

GEO M6 – LS18S SYSTEM CHECK LIST Page 41/62

10 GEO M6 – LS18S SYSTEM CHECK LIST

It is essential to execute all these check steps prior to perform a sound check on the “front end” to the

system. Following this checklist step by step will prevent many troubles and will save time in the end.

10.1 Are the speakers properly connected and angled ?

Attach the first series of modules to the bumper.

Before flying, verify that all channels of all modules are functioning properly.

To check that all elements have the proper amplitude and phase, you should listen to the upper boxes

at a close distance (<1 meter). You should be able to move from the top to the bottom of the cluster

without hearing any change in the tonal balance.

Raise the bumper, attach the next series of modules and repeat the above checks.

Make sure that these series of modules sum properly with the modules above them.

When all the modules are flown, check that the aiming angles are the same left and right.

Make sure that multiple GEO M6 and LS18 are summing properly: 6 dB gain per doubling of quantity.

10.2 Final Pre-Sound Check Check

Play a CD track mono left, and then right: both sides must sound strictly identical. When listening in the

centre between Left and Right GEO M6’s, everything from LF to HF should be located to the “phantom

centre” position. If not, repeat the above check sequence to identify the source of the problem.

Page 42/62 TECHNICAL SPECIFICATIONS

11 TECHNICAL SPECIFICATIONS

11.1 LS18 Subwoofer

System specifications 11.1.1

SYSTEM SPECIFICATIONS

LS18 with NXAMP TD Controller

Frequency Response [a]

35 Hz - 120 Hz ±3dB

Usable Range @-6dB [a]

32Hz - 130 Hz

Sensitivity 1W @ 1m [b]

107 dB SPL Nominal

Nominal Peak SPL @ 1m [b]

137 to 140 dB Peak

Nominal Impedance

8 

Crossover Frequencies

60 Hz – 85 Hz - 120 Hz Active

Amplified Controller

NXAMP4x1: 2 x LS18 in parallel on 2 bridged channels

NXAMP4x4: 2 x LS18 on 1 channel

SYSTEM OPERATION

Electronic Controller

The NEXO NXAMP presets are precisely matched to the LS series cabinets and include sophisticated

protection algorithms. Using LS Series cabinets without a properly connected NXAMP will result in poor

quality and can damage components

Speaker Cables

LS18 is wired 1- & 1+ on 2 In/Out Speakon connectors

PRODUCT FEATURES

LS18 (LS18e)

Components:

1 x 18’’ (46cm) 4’’ voice coil long excursion 8  driver

Height x Width x Depth

510 x 675 x 775 mm (20.1” x 26.1” x 30.5”)

Weight : Net

55.5 kg excluding accessories (122.3 lb)

Connectors

2 x NL4MP Speakon 4 pole

Construction

Baltic Birch Ply & structured black coating

Fittings: Handles

4 metal recessed pockets (None)

Front finish

Molded Dark Grey Metal Grill

Flying Points

Two side plates connecting with external accessories (None)

Stand fittings

Internal Steel Stand Fitting on Top (35mm, 1"3/8) allows pole mounting for Geo M6

As part of a policy of continual improvement, NEXO reserves the right to change specifications without notice.

[a] Response curves & data : Half-Space Anechoïc radiation for the LS18 + NXAMP.

[b] Sensitivity & Peak SPL data : these will depend on spectral distribution and crest factor of program material. Measured with band limited Pink Noise., Wideband to the

specified ±3dB range. Data are for speaker + processor + recommended amplifier combinations. Peak SPL is at clipping of recommended amplifier.

[c] Directivity curves & data : obtained by computer treatment on off axis response curves.

TECHNICAL SPECIFICATIONS Page 43/62

Dimensions 11.1.2

Page 44/62 TECHNICAL SPECIFICATIONS

11.2 GEO M620 Module

System specifications 11.2.1

SYSTEM SPECIFICATIONS

GeoM620 with NEXO controller setup

Frequency Response

80 Hz - 19 kHz ±3dB

Usable Range @-6dB

75Hz - 20 kHz

Sensitivity 1W @ 1m

95 dB SPL Nominal

Nominal Peak SPL @ 1m

128 dB

HF Dispersion

80° or 120° Horizontal

Crossover Frequencies

LF-HF: 2 kHz Passive

Nominal Impedance

8

Recommended Amplifiers

450W per box (3 boxes max in parallel on one channel amplifier)

PRODUCT FEATURES

GeoM620

Components : LF]

LF: 1x 6,5", 8 ohms long excursion driver

HF : 1x 1" throat driver on a BEA/FEA optimized HR Wavesource

Height x Width x Depth

191 x 373 x 260 mm

Weight : Net

9.7 kg

Connectors

2 x NL4 Speakon 4 poles

Construction

Lightweight Polyurethane composite

Fittings: Handles

Side “Geo” Handles

Front finish

Acoustic Fabric fitted front grill

SYSTEM OPERATION

Electronic Controller

The NEXO controller’s presets are precisely matched to the GeoM Series cabinets and include sophisticated protection.

Using GeoM Series cabinets without a properly connected NEXO controllers will result in poor sound quality and can

damage components.

Dispersion configuration

Flanges

Speaker Cabling

2+/2-

As part of a policy of continual improvement, NEXO reserves the right to change specifications without notice.

TECHNICAL SPECIFICATIONS Page 45/62

Dimensions 11.2.2

Page 46/62 TECHNICAL SPECIFICATIONS

11.3 GEO M6Bass Module

System specifications 11.3.1

SYSTEM SPECIFICATIONS

GeoM6Bass with NEXO controller setup

Frequency Response

75 Hz - 120 Hz ±3dB

Usable Range @-6dB

70Hz - 120 Hz

Sensitivity 1W @ 1m

94 dB SPL Nominal

Nominal Peak SPL @ 1m

125 dB

Nominal Impedance

8

Recommended Amplifiers

450W per box (3 boxes max in parallel on one channel amplifier)

PRODUCT FEATURES

GeoM6Bass

Components : LF

LF: 1x 6,5", 8 ohms long excursion driver

Height x Width x Depth

191 x 373 x 260 mm

Weight : Net

7.6 kg

Connectors

2 x NL4 Speakon 4 pole

Construction

Lightweight Polyurethane composite

Fittings: Handles

Side “Geo” Handle

Front finish

Acoustic Fabric fitted front grill

SYSTEM OPERATION

Electronic Controller

The NEXO controller’s presets are precisely matched to the GeoM Series cabinets and include sophisticated protection.

Using GeoM Series cabinets without a properly connected NEXO controllers will result in poor sound quality and can

damage components.

Speaker Cabling

1+/1-

As part of a policy of continual improvement, NEXO reserves the right to change specifications without notice.

TECHNICAL SPECIFICATIONS Page 47/62

Dimensions 11.3.2

Page 48/62 TECHNICAL SPECIFICATIONS

11.4 GEO M6 Accessories

GMT-BUMPER 11.4.1

Parts

Dimensions

Weight : 2,25 kg / 4.96 lb

TECHNICAL SPECIFICATIONS Page 49/62

GMT-EXBAR 11.4.2

Parts

Dimensions

Weight : 2,25 kg / 4.96 lb

Page 50/62 TECHNICAL SPECIFICATIONS

GMT-BPDAPT 11.4.3

Parts

Dimensions

Weight : 0,5 kg / 1.10 lb

TECHNICAL SPECIFICATIONS Page 51/62

GMT-LBUMPER

11.4.4

Parts

Dimensions

Weight : 1,8 kg / 3.96 lb

Page 52/62 TECHNICAL SPECIFICATIONS

GMT-LBPADPT 11.4.5

Parts

Dimensions

Weight : 0,7 kg / 1.54 lb

TECHNICAL SPECIFICATIONS Page 53/62

VNT-POLE 11.4.1

Parts

Dimensions

Weight : 0,9 kg / 1.98 lb

Page 54/62 TECHNICAL SPECIFICATIONS

VNT-XHBRK

11.4.2

Parts

Dimensions

Weight (kit) : 0,3 kg / 0.661 lb

TECHNICAL SPECIFICATIONS Page 55/62

VNT-TCBRK 11.4.3

Parts

Dimensions

Weight (kit) : 0,620 kg / 1.37 lb

Page 56/62 TECHNICAL SPECIFICATIONS

GMT-IPCOV

11.4.1

Parts

Dimensions

Weight : 0,34 kg / 0.013 lb

TECHNICAL SPECIFICATIONS Page 57/62

VXT-BL515 PUSH PINS

11.4.2

Weight : 0,012 kg / 0.0004 lb

GMT-BNFIX 11.4.3

Parts

Weight (kit) : 0,2 kg / 0.008 lb

Page 58/62 TECHNICAL SPECIFICATIONS

VNI-WS15 11.4.4

Parts

Dimensions

Weight (kit) : 2,8 kg / 0.11 lb

TECHNICAL SPECIFICATIONS Page 59/62

GMT-6CASE

11.4.5

Weight : 57 kg / 2.24 lb

Page 60/62 GEO M6 SERIES PARTS & ACCESSORIES LIST

12 GEO M6 SERIES PARTS & ACCESSORIES LIST

12.1 Modules & Control Electronics List

MODEL

DRAWING

DESCRIPTION

LS18

Subwoofer Module

GEO M620

GEO M620 Module

GEO M6B

GEO M6B Module

NXAMP4x1

Digital Powered Controller 4x1300W

12.2 Accessories List

MODEL

DRAWING

DESCRIPTION

GMT-BUMPER

Main GEOM6 Bumper

(up to 12 x GEO M6 maximum)

GMT-EXBAR

Extension Bar for GMT-BUMPER

GMT-LBUMP

Light GEO M6 Bumper

(up to 3 x GEO M6 maximum)

GMT-LBPADPT

Adaptor for GMT-LBUMP

VXT-BL515

5x15 Quick Release Pin for Geo M6

GEO M6 SERIES PARTS & ACCESSORIES LIST Page 61/62

MODEL

DRAWING

DESCRIPTION

VNT-XHBRK

Cable clamp for GMT-LBADPT (includes 8x45 Quick

Release Pin).

VNT-TCBRK

Truss clamp for GMT-LBADPT (includes 8x45 Quick

Release Pin)

GMT-BPADPT

Pole Mount for GMT-BUMPER

GMI-BNFIX

GEO M6 Connection kit for fix installation

VNT-POLE

Pole Mount for GMT-LBUMP

GMI-IPCOV

Connector protection for IP54 rating

GMT-6CASE

Flight Case for 6 x GEO M6 + Hardware

VNI-WS15

Wall Mount suspension for GMT-LBUMP

Page 62/62 USER NOTES

13 USER NOTES

France

Nexo S.A.

Parc d’activité de la Dame Jeanne

F-60128 PLAILLY

Tel: +33 3 44 99 00 70

Fax: +33 3 44 99 00 30

E-mail: [email protected]r

www.nexo-sa.com

Nexo Geo M6Bass Manual de usuario

Marca: Nexo

Modelo: Geo M6Bass

Categoría: Equipo de música suplementario

Tipo: Manual de usuario

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