Musica MU290 Operating instructions

Audio Distribution System

Installation and Operation Guide

Creating the future of home entertainment - today.

THIS DOCUMENT WAS WRITTEN AND PREPARED BY THE TECHNICAL SERVICES

DEPARTMENT AT:

All brand names, product names and trademarks are properties of their respective owners

3600 W Parmer Lane, Suite 100

Austin, TX 78727

Phone 512.977.9393 • Fax 512.977.9398

This document explains features and configuration

of the MU290 for Musica

NetStreams Musica Power Amplifier

Table of Contents

Introduction 1

Safety 2

Features 4

Configuring for Stereo Operation 5

Configuring for Bridged (Mono) Operation 6

MU290 Input Controls 6

Configurations 7

Mounting 9

Special Consideration 9

Trouble Shooting 9

Specifications 10

NetStreams Musica Power Amplifier

main.512.977.9393 / fax.512.977.9398 / 3600 W. Parmer Lane, Austin, TX 78727 / www.netstreams.com

NS-0104-7064 1

Introduction

The MU290 amplifier offers high performance, high efficiency, low power consumption and

extended duty cycles in a very compact half-rack/flat-back package.

The MU290 Power Amplifier is a high quality, class A/B amplifier. This powerful yet

compact amplifier utilizes Darlington pairs for linear operation and offers 90 watts per

channel or 200 watts bridged into a 4 ohm load. In keeping with Musica’s system design of

distributed amplification, the MU290 allows you to install the amplifier in the room close to

the speakers. This amplifier is designed to be either rack-mounted, flat-back mounted or

set on a shelf.

In order to obtain maximum performance from your MU290 Power Amplifier, please take

the time to read this brief manual and carefully follow the guidelines for connection and

operation.

If after reviewing this manual you should have any questions concerning installing and

operating the MU290, please contact technical support at [email protected].

NetStreams Musica Power Amplifier

main.512.977.9393 / fax.512.977.9398 / 3600 W. Parmer Lane, Austin, TX 78727 / www.netstreams.com

NS-0104-7064 2

Safety

Before using your MU290 External Amplifier, please read this Owner’s Manual carefully to

ensure optimum trouble-free performance.

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE

THIS APPLIANCE TO RAIN OR MOISTURE. CAUTION TO REDUCE THE RISK OF

ELECTRIC SHOCK, DO NOT REMOVE COVER. NO USER - SERVICEABLE PARTS

INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

¾The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to

alert the user to the presence of un-insulated “dangerous voltage” within the products

enclosure that may be of sufficient magnitude to constitute a risk of electric shock to

persons.

¾The 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.

IMPORTANT SAFETY INSTRUCTION-PLEASE READ PRIOR TO PRODUCT INSTALLATION.

1. All of the safety and operating instruction should be read before the amplifier is operated.

Retain these instructions for future reference. All instructions should be followed; all

warnings on the amplifier and in the operating instructions should be adhered to.

2. This amplifier should not be used near water, for example, near a bathtub, washbowl,

kitchen sink, laundry tub, in a wet basement, near a swimming pool, etc.

3. The amplifier should be situated so that its location and position do not interfere with its

proper ventilation. For example; the amplifier must not be placed on a rug, bed, sofa, or

similar surface which impedes airflow across the chassis. Airflow through the ventilation

openings should be unobstructed.

4. Do not place the amplifier near heat sources such as radiators, heat registers, stoves, or

other appliances that produce heat.

NetStreams Musica Power Amplifier

main.512.977.9393 / fax.512.977.9398 / 3600 W. Parmer Lane, Austin, TX 78727 / www.netstreams.com

NS-0104-7064 3

Safety (continued)

5. The amplifier should only be connected to 120 VAC, 60 cycle grounded power supply.

To avoid defeating the ground polarization of the power plug, do not remove the ground

pin on the plug and check the outlet for correct polarization before plugging in the

amplifier’s power cord.

6. Route power cord and other cables so that they are not likely to be walked on, tripped

over, or stressed. Pay particular attention to condition of cords and cables at plugs, and

the point where they exit from the amplifier. To prevent risk of fire or injury, damaged

cords and cables should be replaced immediately.

7. Clean the amplifier with a damp cloth. Do not use solvents or abrasive cleaners. Never

pour any liquid on or in the amplifier.

8. Damaged amplifiers requiring service. The amplifier should be serviced by qualified

service personnel when:

the power supply cord or the plug has been damaged.

objects have fallen or liquid has spilled into the unit.

the amplifier has been exposed to rain or other moisture.

the amplifier does not appear to operate normally or exhibits a marked.

the amplifier has been dropped, or the enclosure damaged.

9. The amplifier should be situated so that its location and position do not interfere with its

proper ventilation. For example; the amplifier must not be placed on a rug, bed, sofa, or

similar surface which impedes airflow across the chassis. Airflow through the ventilation

openings should be unobstructed.

10.The user should not attempt to service the amplifier beyond that described in the

operating instructions. All other servicing should be referred to qualified service

personnel.

NetStreams Musica Power Amplifier

main.512.977.9393 / fax.512.977.9398 / 3600 W. Parmer Lane, Austin, TX 78727 / www.netstreams.com

NS-0104-7064 4

Features

This section of the manual provides an overview of the features that make this amplifier

unique.

Note: Observe proper polarity in interconnecting all system components.

Caution: Do not connect AC power until all other connections are made.

RJ45 Input/output

The amplifier has been designed for the NetStreams product line and has features that

allow for a simple installation and the ability to add more products as they become

available. The RJ45 connection allows an input from the keypads and an output to another

MU290 Power Amplifier or to an Audio Port (EIM). This allows up to six amplifiers to be

linked together off of one Keypad for those large area applications. Maximum

recommended distance between a Musica keypad and the last product (amplifier or Audio

Port) is 75 ft.

Note: The Terminator RJ45 Plug needs to be installed in the Out put connection for the

setting in the Keypad to be set.

All RJ45 terminations for the connection between a Musica 2.0 keypad and the MU290 are

a straight through terminations; meaning that pin 1 goes to pin1, pin 2 to pin 2.

If a 1.0 Musica keypad is used, the chart below describes the termination.

1.0 Keypad Amplifier

Pin 1 3

2 4

3 5

4 6

5 7

6 8

N/A 1

N/A 2

NetStreams Musica Power Amplifier

main.512.977.9393 / fax.512.977.9398 / 3600 W. Parmer Lane, Austin, TX 78727 / www.netstreams.com

NS-0104-7064 5

Configuration for Stereo Operation

Input Connections

Run a Cat5e cable from the Keypads Audio Port (EIM) output, to the input of the MU290.

Output Connections

RJ45 Output

The RJ45 Terminator Plug comes installed in the MU290 but can be removed to add

additional MU290’s or an Audio Port. If an Audio Port is not used then the RJ45 Terminator

plug will need to be installed in the last MU290 of the chain. See figure 1.

Speaker Output

Speaker leads connect via a 4 position Phoenix connector. Be sure to match up the polarity

of correctly. (See amp for polarity).

Prepare speaker leads by stripping insulation back 3/16” (6mm). Twist strands together

slightly to ensure that there are no stray strands. Connect to terminals that correspond to

the channel outputs as follows:

Fig. 1

With a small, flat-blade screwdriver, after inserting the speaker wires into the appropriate

hole in the Phoenix connector, tighten the screw until the leads are held securely in place.

Inspect for possible shorts or broken wires.

Check the position of the front-panel Bridged/Stereo Mode Selector Switch. The button

should be in the “out” position. Be sure the power button is off (out), than plug the line cord

into a grounded 120v AC outlet.

The amplifier is now ready for stereo operation.

NetStreams Musica Power Amplifier

main.512.977.9393 / fax.512.977.9398 / 3600 W. Parmer Lane, Austin, TX 78727 / www.netstreams.com

NS-0104-7064 6

Configuration for Bridged (Mono) Operation

The MU290 Power Amplifier may also be operated as a powerful single-channel amplifier.

This “bridged” mode requires special attention to input and output wiring configurations.

Input Connections

The right and left audio signal will need to be summed together in order to have both

channels play out of one speaker. This will need to be done by the installer. Pins 3 and 4 on

the RJ45 connection will need to be linked together in order to get a mixed mono signal.

Output Connections

Prepare the speaker leads as described on page 3. Insert the stripped leads onto screw

terminals 2 and 4 ONLY (Channel 1 Positive (Becomes the Negative) and Channel 2

Positive). Make no connection to terminal 1 and 3. Inspect for possible shorts or broken

wires.

Depress the front-panel button marked Bridged/Stereo. Push it in as far as it will go. Be

sure the power button is off (out), than plug the line cord into a grounded 120v AC outlet.

The amplifier is now ready for mono operation.

MU290 Input Controls

The input sensitivity of each amplifier channel is adjustable for optimum performance with

any line-level source. Adjustment is achieved by means of screwdriver-adjustment rotary

controls, recessed behind the front panel. With typical program source levels present,

adjust each channel to provide the highest level without distortion. If distortion persists,

check the preceding components. The most noticeable distortion usually occurs in early

stages of the audio system, such as in the source or its cables. Once you have adjusted

the input sensitivity the amplifier will be ready for extended use.

Pin Out Description

1 IR Out +

2 IR Ground

3 Left Input Audio +

4 Right Input Audio +

5 Ground

6 Audio Logic

7 Left Output Audio +

8 Right Output Audio +

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