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Nexo RS18

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Ray Sub Series
RS18 Subwoofer
User Manual
RS18 Subwoofer User Manual V1.02
Date: 31/08/2010

Table of Contents

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Nexo RS18 Specifications

General IconGeneral
TypeSubwoofer
Driver Size18 inches
Impedance8 Ohms
Enclosure TypeBass Reflex
Sensitivity105 dB
Connectors2 x NL4

Summary

Going One Step Further in Low Frequency Control: Ray Sub Technology

Basic Precautions

System Deployment Safety Rules

Mounting Precautions

Guidelines for securely mounting the speaker system and its components.

Connection and Powering Precautions

Safety measures for connecting and powering the audio system and speakers.

Safety Instructions for NEXO TD Controllers

High Sound Pressure Levels

Disposal of Old Electrical & Electronic Equipment

2 RS18 General Instructions

2.1 Mounting Rigging Plate

Procedures for installing the rigging plate on the RS18 subwoofer.

2.2 Speaker Connection

Details on how to connect speakers to the RS18 system.

1 Introduction

RS18 General Instructions

1.1 Mounting Rigging Plate

Procedures for installing the rigging plate on the RS18 subwoofer.

1.1.3 RS18 Dolly

Instructions for attaching the RS18 to the dolly for transport.

1.1.4 RS18 Wheel Board

Instructions for attaching the RS18 to the wheel board for transport.

1.2 Speaker Connection

Details on how to connect speakers to the RS18 system.

1.2.3 Cabling

Recommendations and guidelines for selecting appropriate speaker cables.

1.2.4 Example

Practical examples illustrating cable length calculations for RS18.

Amplifier Selection for Use with RS18

2.1 RS18 Recommended Amplification

Recommended amplifier specifications for RS18 in Omni and Directional modes.

2.2 Current Rating

Importance of amplifier current capacity and testing procedures for low load conditions.

2.3 Amplifier Settings

Key considerations for setting amplifier gain and practical methods to determine it.

3 NEXO TD Controllers and RS18 Setups

3.1 RS18 and NXAMP TDControllers

Details on the NXAMP series controllers and their power capabilities for RS18.

3.1.1 NXAMP Connectors

Description of connectors found on the rear panel of NXAMP controllers.

3.1.2 RS18 and NXAMP Recommended Configurations

Recommended configurations for RS18 with NXAMP controllers in Omni and Directional modes.

3.2 RS18 Setups on NXAMP TDControllers

Availability of RS18 setups for NXAMP TD controllers and update information.

4 Connection Diagrams

4.1 RS18 with NX242-ES4 TD Controller (Stereo Omni or Directional Mode)

Connection diagram for RS18 with the NX242-ES4 TD controller.

4.2 RS18 with NXAMP4 x4 (Stereo Omni or Directional Mode)

Connection diagram for RS18 with the NXAMP4x4 controller.

5 RS18 Rigging Instructions

5.1 SAFETY FIRST

Critical safety warnings and precautions for rigging and flying the RS18 system.

5.1.1 Flown Systems Safety

Specific safety considerations for flying RS18 systems in suspended arrays.

5.1.2 Ground Stacking Safety

Safety guidelines for safely stacking RS18 cabinets on the ground.

5.1.3 Contacts

Contact information for training agencies and industry associations related to rigging.

5.2 Flying RS18 Arrays

5.2.1 Hoist Rating

Information on appropriate hoist ratings based on the number of RS18 units in a cluster.

5.2.2 Connecting First RS18 to Bumper

Step-by-step guide to connecting the first RS18 to the rigging bumper.

5.2.3 Adjusting Rigging Point for Horizontality

How to adjust rigging points to ensure the bumper remains horizontal.

5.2.4 Flying Subsequent RS18 s

Steps for attaching and flying additional RS18 cabinets in an array.

5.3 Testing and Maintenance of the RS18 Flying System

6 General Guidelines for Subwoofer Design

6.1 Low Frequency Issues

Discusses challenges in controlling low-frequency coverage and radiation.

6.2 Gradient Subwoofers Benefits

Advantages of gradient subwoofers, including front-to-rear attenuation and room mode sensitivity.

6.3 Monophonic Design

Strategies for merging left/right subwoofer arrays into a monophonic system for improved coverage.

6.4 Stereo Design

Considerations for stereo subwoofer array design to minimize interference and optimize coverage.

7 RAY SUBS Implementation

7.1 Omnidirectional Mode

Guidelines for implementing the RS18 in omnidirectional mode.

7.1.1 Single RS18

Use cases and coverage characteristics of a single RS18 in omni mode.

7.1.2 RS18 Arrays

Guidelines for array implementation in omnidirectional mode.

7.2 Directional Mode

Guidelines for implementing the RS18 in directional modes.

7.2.1 Single RS18

Characteristics of a single RS18 in directional mode.

7.2.2 RS18 s Pair

Various configurations for pairing RS18 subwoofers in directional mode.

7.2.3 RS18 s Arrays

Guidelines for flying RS18 arrays in directional mode.

7.3 Steered RS18 s Arrays

Techniques for steering RS18 arrays to adjust coverage patterns.

7.3.1 Steering Technique

Explanation of the steering technique using delays to tilt coverage.

7.3.2 Delay Values Implementation

How to implement delay values for steering coverage up or down.

7.3.3 Coverage Result

Illustrates coverage results with steered delay sequences.

7.4 Aligning RS18 s with Main System

Procedures for aligning RS18 systems with main PA systems.

7.4.1 NEXO Systems Acoustic Reference Point

Definition of acoustic reference points for NEXO systems alignment.

7.4.2 Precautions

Important precautions when using auxiliary sends for subwoofers and time alignment.

7.4.3 Alignment with Distance Measurement

Method for aligning systems using distance measurements and delay calculations.

7.4.4 Alignment with Phase Measurement

Using phase measurement for reliable system alignment.

7.5 Recommended Installation Tools and Equipment

List of essential tools and equipment for system installation.

8 RS18 System Check List

8.1 Are the NX Digital TDcontrollers Properly Configured?

Verifying the correct configuration of NX digital TD controllers.

8.2 Are the Amplifiers Properly Configured?

Checking the proper configuration of the amplifiers.

8.3 Are the Amps and the NX Properly Connected?

Ensuring correct physical connections between amplifiers and NX controllers.

8.4 Are the Speakers Properly Connected?

Verifying the correct connection and functionality of the RS18 speakers.

8.5 Final Pre-Sound Check Check

Performing final checks before initiating sound checks.

9 RS18 Technical Specifications

9.1 System Specifications

Overview of RS18 product features and system specifications with controllers.

9.2 Dimensions

Dimensional drawings and measurements of the RS18 subwoofer.

9.3 RS18 Accessories

List and details of available accessories for the RS18.

9.3.1 RS18-BUMPER

Technical specifications and dimensions for the RS18 bumper accessory.

9.3.2 RS18 Push-Pins

Technical specifications and dimensions for the RS18 push-pin accessory.

9.3.3 RS18-FPLATES

Technical specifications and dimensions for the RS18 flying plates accessory.

9.3.4 RS18-FRONT WHEELBOARD

Technical specifications and dimensions for the RS18 front wheel board accessory.

9.3.5 RS18-DOLLY

Technical specifications and dimensions for the RS18 dolly accessory.

9.4 NX242-ES4 Digital TDController

Technical specifications and panel views for the NX242-ES4 Digital TDController.

9.5 NXAMP4 x1 & NXAMP4 x4 Powered Digital TDControllers

Technical specifications for NXAMP4x1 and NXAMP4x4 powered digital controllers.

10 RS18 Parts & Accessories List

10.1 Modules & Control Electronics List

List of main modules and control electronics for the RS18 system.

10.2 Accessories List

Detailed list of all available accessories for the RS18.

11 USER NOTES

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