Beta Three MU18 B 18 Inch Subwoofer MU Series Pro Loudspeaker System User Manual

: June 5, 2024
: Beta Three

Beta Three MU18 B 18 Inch Subwoofer MU Series Pro Loudspeaker
System

MU18 B
18″ subwoofer
MU Series Pro Loudspeaker System
User Manual

SAFETY INSTRUCTIONS

PLEASE READ THIS MANUAL FIRST
Thank you for buying β the product. Read this manual first as it will help you operate the system properly. Please keep this manual for future reference.
WARNING: This product must be installed by professionals. When using hanging brackets or rigging other than those supplied with the product, please ensure they comply with the local safety codes.

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.

The exclamation point within an equilateral triangle is intended to alert you to the presence of important operating and servicing instructions.
ATTENTION: Don’t refit the system or spare parts without being authorized as this will void the warranty.
WARNING: Don’t place naked flames (such as candles) close to the equipment.

Read the instruction first before using this product.
Please keep this manual for future reference
Pay attention to all warnings.
Obey all operating instructions.
Do not expose this product to rain or moisture.
Clean this equipment with a dry cloth.
Do not block any ventilation openings. Install according to the manufacturer’s instructions.
Do not install this product near any heat source, such as a heater, burner, or any other equipment with heat radiation.
Only use spare parts by manufacturer.
Pay attention to the safety symbol on the cover.

Product information is subject to be updated without notification, please visit www.elderaudio.com for the latest update.

INTRODUCTION

MU18 B 18″ subwoofer

Feature

Single 18″ phase inverted subwoofer.
Sensitivity is 97dB, Max. SPL is 124dB.
Rated power is 500W, peak power is 2000W.
The powder-coated grille can be used outdoors for 5 years.
The foam backside of the grille can prevent the rain.
The new paint materials and advanced painting technology make the surface very rigid.

Description

B3 MU18B is a subwoofer adopting a new structure and new painting technology in the MU family. It integrates an 18″ /8ohm woofer with a 100mm voice coil. The rated power is 500W, peak power is 2000W. Asymmetrical magnet circuit design reduces the impair HD effectively and enhance the LF sound quality.
The cabinet is made of 18mm birch plywood with advanced environmental protection Polyurethane-based painting which is very rigid. The cabinet strength reaches 4500N. Q235 grille is coated by powder to provide strong ultraWeatherability, and can be used outdoors for 5 years. The backside foam of the grille can prevent the rain.
The special feet in the bottom can assure the stable working.
MU18B is mainly designed for the applications in the conference room, multifunctional hall, small auditorium, church, and living performance.

Application

Church
Conference Room
Multifunctional Hall
Medium And Small Auditorium
Medium And Small Living Performance

CONNECTION

Two NL4 connectors are available for amplifier connections. The paralleled connector is very convenient for another speaker connection.

Terminal Plate

Beta Three MU18 B 18 Inch Subwoofer MU Series Pro Loudspeaker System -
Terminal Plate |
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NL4 Connection

1. Connect

| 2. Disconnect

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System Connection Reference

Attention: The impedance of the connected speaker must match the impedance of the amplifier output.
Attention: Make sure the polarity of the speaker and amplifier correct.

Speaker Wiring

Banana plugs to NL4
NL4 to NL4
Consumption curve of connection cable(Only for reference, the result is different if adopting the different cables)

INSTALLATION

Mounting Accessories

The support flange in the top of MU18B is for the pole mounting application with MU12/MU15.

Beta Three MU18 B 18 Inch Subwoofer MU Series Pro Loudspeaker System -
Accessories

Installation Reference

Stack

Warning: Make sure the mounting accessories’ safety factor is not less than 5:1 or meets the local standard during installation.

TECHNICAL SPECIFICATION

Specification

System:	Passive low-frequency speaker
Woofer:	1 x 18″ Woofer
Frequency response(-3dB)¹:	40Hz-300Hz
Frequency response(-10dB):	35Hz-600Hz
Sensitivity(1 W©1 m)²:	97dB
M ax.SPL(1 m )3:	124d B/130d B(PEAK)
Power:	500W (RMS)4

Speaker Testing Method

Frequency response
Use Pink noise to test the speaker in the anechoic room, adjust the level to make the speaker work at its rated impedance and the power output is 1W, then test the
frequency response 1m away from the speaker.
Sensitivity
Use full range Pink noise which was modified by EQ curve to test the speaker in the anechoic room, enlarge the signal to make the speaker work at its rated impedance and the power output is 1W, then test the sensitivity 1m away from the speaker.
MAX.SPL
Use full range Pink noise which was modified by EQ curve to test the speaker in the anechoic room, enlarge the signal to make the speaker work at its instant power output level, then test the SPL 1m away from the speaker.
Rated Power
Use the pink noise according to IEC#268-5 to test the speaker, and enlarge the signal for a continuous 100hours, the rated power is the power when the speaker will not incur hot damage or mechanics damage.