Nexo 45N User Manual

NEXO 45°N 12

Line Monitor

User Manual

45°N-12 User Manual V1.01b
Date: 06/01/2011

Page 2/26 INTRODUCTION

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.

INTRODUCTION Page 3/26

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 plu g 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.

The lightning flash with arrowhead

symbol, within an equilateral triangle

is intended to alert the user to the

presence of uninsulated “dangerous

voltage” within the product's

enclosure that may be of sufficient

magnitude to constitute a risk of

electric shock to persons.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

WARNING: To reduce the risk of fire or electric shock,
do not expose this apparatus to rain or moisture.

To avoid electrical shock, do not remove covers.

Dangerous voltages exist inside.

Refer all servicing to qualified personnel only.

The exclamation point within an

equilateral triangle is intended to

alert the user to the presence of

important operating and

maintenance (servicing) instructions

in the literature accompanying

the appliance.

Page 4/26 INTRODUCTION

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

8 90
6 92
4 65
3 97
2 100

1 ½ 102

1 105

½ 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 wor n 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 in appropriate wast e handling of thi s product. The recy cling of material s
will help to conserve natural resources. For more detailed information about
recycling of this pr oduct, please co ntact your loc al city office , your hous ehold waste
disposal service or the shop where you purchased the product.

INTRODUCTION Page 5/26

CONTENTS

1 Introduction ................................................ ............................................................................................... 6

2 45N12 General Set-up Instructions.................................. ......... ..... ..... .... ......... ..... .... ..... ......... .... ............. 8

2.1 Speaker connection............................................................................................................................ 8

2.1.1 45°N-12 Connector Panel .......................................................................................................... 8

2.1.2 Configuring 45N12 for Passive or Active Mode.......................................................................... 8

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

3 Amplifier Selection for use with 45°N-12 ............................................................................................... 11

3.1 45N12 recommended amplification................................................................................................... 11

3.1.1 Current rating........................................................................................................................... 11

3.1.2 Amplifier settings...................................................................................................................... 11

3.2 45°N-12 and NXAMP TDControllers......... .... ..... ..... ......... .... ..... ......... ..... .... ..... ......... .... ..... ......... ......13

3.2.1 NXAMP connectors.................................................................................................................. 13

3.2.2 45°N-12 and NXAMP recommended configurations................................................................ . 13

4 Connection diagrams.............................................................................................................................. 14

4.1 45°N-12 / NXAMP4x1 - Bridge Stereo – Active mode....................................................................... 14

4.2 45°N-12 / NXAMP4x1 - Bridge Stereo – Passive mode............ ....................................................... . 15

4.3 45N12 / NXAMP4x4 - 4 Channels – Active Mode............................................................................. 16

4.4 45°N-12 / NXAMP4x4 - 4 Channels – Passive Mode........................................................................ 17

4.5 45°N-12 / NX242-ES4 – Active Mode......................... ......................................................................18

4.6 45°N-12 / NX242-ES4 – Passive Mode............................................................................................ 19

5 Application guidelines............................................................................................................................ 20

5.1 SAFETY FIRST................................................................................................................................ 20

5.2 45°N-12 Coverage.... ..... .... ......... ..... .... .......... .... ..... ......... .... ..... ......... ..... .... ......... ..... .... ..... ............... 20

5.3 Handling 45 N-12 on stage............................................................................................................... 21

5.4 Stage monitoring applications................................. .... ..... .... ......... ..... ..... .... ......... ..... .... ..... ............... 22

5.5 Testing and Maintenance of the system ....... ....................................................................................23

6 45°N-12 Technical Specifications .......................................................................................................... 24

6.1 System specifications............................................................................................... ........................ 24

6.2 Dimensions................................................................. ...................................................................... 25

6.3 Component List ................................................................................................................................ 25

7 USER NOTES..................................... ...................................................................................................... 26

Page 6/26 INTRODUCTION

1 INTRODUCTION

Thank you for selecting a NEXO 45°N-12 floor monitor.
NEXO’s 45°N-12 monitor loudspeaker is the first product based on a radical new concept in stage

sound – that of line monitoring.
The revolutionary NEXO 45°N-12 wedge monitor brings all the benefits of line-array technology to the

stage.
It draws on NEXO’s patented Hyperbolic Reflective Wavesource which is used throughout the GEO

range of high-performance loudspeakers. The design works by wavesourcing, creating virtual ac oustic
sources behind the enclosure itself and below the stage, using reflection rather than coercion to
determine the shape of the wavefront.

Unlike a conventional high frequency waveguide in which the exit is rectangular, the NEXO monitor’s
waveguide enables cabinets to be linked together to form arrays without interferences between
wavefronts.

Practical benefits for stage monitoring applications are:

- steady frequency in coverage area;

- higher SPL and feedback threshold;

- sharp side attenuation;

- coverage and SPL scalability.

This manual is intended to provide you with necessary and useful information about your NEXO 45°N­12 floor monitor system.

INTRODUCTION Page 7/26

As for all NEXO systems, NEXO 45°N-12 is controlled, powered and monitored by dedicated NEXO
TDControllers:

NX242-ES4 Digital TDController provides comprehensive control of N12 line monitors in multiple
configurations. It allows EthersoundTM digital audio networking, as well as remote control for all units in
the network. It has 2 analogue / 4 digital inputs and 4 analogue / 4 digital outputs.

IMPORTANT

NX242 must be equipped with NX-Tension Card (NX-ES4) to access N12 setups

NXAMP4x1 and NXAMP 4x4 are Powered Digital Controllers, providing full control and amplification for
45N12 in multiple configurations. Both devices feature 4 analogue inputs and 4 speaker outputs. When
equipped with optional card, 4 digital inputs in EthersoundTM digital audio network format as well as
remote control for all units in the net work become avai lable.

For a complete description of these controllers, please refer to User Manuals. The NX242 and NXAMP
DSP algorithms and parameters are fixed in software and updated regularly: Please consult the NEXO
web site (www.nexo.fr

) for the latest software releases.

GeoD Passive mode
Crossover 80Hz

Page 8/26 45N12 GENERAL SET-UP INSTRUCTIONS

2 45N12 GENERAL SET-UP INSTRUCTIONS

2.1 Speaker connection

NEXO 45°N-12 are connected with Speakon NL4FC plugs (not supplied). A wiring diagram is printed on
the connection panel located on the back of each cabinet. 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 amplifier or to link to an additional 45N12 cabinet.

2.1.1 45°N-12 Connector Panel

Connectors are wired as follows:

Speakon

Connector

1(-)

1(+)

2(-)

2(+)

Passive

Ö
Ö
Ö
Ö

Not Connected 45N12 LF (-)
Not Connected 45N12 LF (+)

45N12 (-) 45N12 HF (-)

45N12 (+) 45N12 HF (+)

Mode

Active

Mode

2.1.2 Configuring 45N12 for Passive or Active Mode

IMPORTANT

45N12 are factory configured in active mode

In order to c hange active or passive configuration:

- remove the TORX screws that hold the rear/bottom metal panel;

- remove the rear/bottom metal panel to access passive network WAGO connectors.
In Passive Mode, WAGO connector should be inserted in “Passive In”, and speakers WAGO

connectors should be inserted in connector “Passive Out”.
In Active Mode, WAGO Connector should be directly connected to speakers via speakers WAGO

connectors (passive filter is then bypassed).