Musica Configuration for Bridged Mono Operation, MU290 Input Controls, Output Connections

NetStreams Musica Power Amplifier

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.

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 +

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.

All specifications subject to change without notification. All rights reserved. Copyright©2004 NetStreams

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