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2

Connect the black wire to the negative (-) battery terminal.

3

Select an option:
• Connect the yellow wire to the positive (+) battery 

terminal, and route the red signal wire 

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 to the ignition or 

another manual switch 

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.

• Connect the yellow wire to the red, and connect them to 

the positive (+) battery terminal.

Speaker Zones

You can group speakers in one area into speaker zones. You 

can then control the audio level of the zones individually. For 

example, you might want the audio quieter in the cabin and 

louder on deck.
You can set the balance, volume limit, subwoofer level, and 

name for each of the available zones. Up to two pairs of 

speakers can be connected per zone in parallel to increase the 

amplifier output.

Subwoofer Amplifier Connection Considerations

This stereo supports output to a powered subwoofer from all 

zone outputs.
The subwoofer port on the stereo outputs a mono line-level 

signal. The port output audio level is linked to the zone.
• You should connect the connectors to the included splitter.
• You need a splitter for each zone. One splitter is included.

Speaker Amplifier Connection Considerations

In addition to the two stereo speaker zones available through 

the wiring harness, this stereo can be connected to multiple 

amplifiers through zone connections.
• The blue wire from the wiring harness must be connected to 

the amplifier to provide a signal to turn on the amplifier with 

the stereo. If it is necessary to extend this blue signal wire, 

use 22 AWG (0.33 mm²) wire.

• The audio output is a stereo line level output over standard 

RCA cable.

Common Connections to the Stereo

You can connect a variety of additional media inputs and 

outputs to the stereo, depending on the stereo model and the 

devices to which you are connecting.
The connectors are color coded to assist you in making the 

correct connections. For example, your TV may have an HDMI 

connector. Connect the HDMI cable to the HDMI connector on 

the stereo. This table lists some possible ways to connect 

devices to the stereo.

NOTE: 

Not all connectors are available on all stereo models.

Input

Stereo Connections

FM/AM radio antenna*

Antenna connector

SiriusXM Connect Tuner

ACCESSORY

USB device

USB connector or the built-in dock (UD 
models)

TV with a composite video 
connector and RCA audio 
line outs

Yellow to COMPOSITE VIDEO 
(MS-650AV only)
RCA line outs from TV to AUX IN 1 or 
AUX IN 2

Input

Stereo Connections

TV with component 
connectors and RCA audio 
line outs

Three component video connectors to 
matching connectors on stereo 
(MS-650AV only)
RCA line outs from TV to AUX IN 1 or 
AUX IN 2

TV with an HDMI connector HDMI (MS-750AV only)

* Metal hull vessels should use a marine, AM/FM, ground-

dependant antenna. Other vessels can use a marine, AM/FM, 

ground-independent antenna.

Audio Return Channel

The Audio Return Channel (ARC) enables you to play the audio 

from the television over the stereo system speakers.
ARC eliminates the need to connect a separate audio cable 

from the HDMI television to the stereo. Typically, in televisions 

without ARC, to play the audio from the television over the 

stereo system speakers, you would need a separate cable. With 

ARC, the HDMI cable sends the television audio to the stereo.
The HDMI version 1.4 cables support ARC. When planning your 

stereo installation, check whether your devices support ARC. 

Most devices that support ARC have an ARC label on the HDMI 

connector that supports ARC.

NOTE: 

The Fusion MS-AV750 supports ARC.

Single-Zone System Wiring Diagram

À

Speakers

Á

Water-tight connection

Three-Zone System Wiring Diagram

À

Zone 1 speakers, powered from Class D amplifier in stereo

Á

Zone 2 speakers, powered from Class D amplifier in stereo

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Zone 3 line out, requires external amplifier

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5-channel amplifier

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