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The subwoofer port on the device outputs a mono line-level 

signal from both RCA connectors. The port output audio level is 

linked to ZONE 3.

• If your subwoofer amplifier has two RCA input connectors, 

you should connect both connectors to the device.

• If your subwoofer amplifier has one RCA input connector, you 

can connect it to either subwoofer output RCA connector on 

the device, because the two RCA subwoofer outputs are 

parallel.

• Because the subwoofer output is linked to the ZONE 3 

output, you must connect the blue wire from the wiring 

harness to the subwoofer amplifier to provide a signal to turn 

it on.

Speaker Amplifier Connection Considerations

In addition to the two stereo speaker zones available through 

the wiring harness, this stereo can be connected to a separate 

amplifier and speakers through the ZONE 3 connection 

(optional).
• 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 mm

2

) wire.

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

RCA cable.

Installing the USB and 3.5 mm Socket

The USB and 3.5 mm socket is provided only with the FUSION 

MS-BB300R stereo and remote bundle. You may purchase the 

USB and 3.5 mm socket as an accessory (MS-CBUSB3.5).
Before installing the socket, make sure the cables will reach the 

mounting location and the ports on the back of the device. If 

needed, the RCA cables can be extended using a standard 

stereo RCA extension cable.
To allow for a proper seal, the mounting surface should be no 

thicker than 15 mm (

 5

/

 8

 in.).

1

Remove the nut 

À

 from the socket and separate it from the 

connected cable by pulling through one connector 

Á

 at a 

time.

Do not remove the protective cover 

Â

 from the socket.

2

Mark the mounting location of the socket and drill a 30 mm 

(1 

3

/

16

 in.) hole through the mounting surface.

3

From the front of the mounting surface, feed the cables 

through the hole by inserting one connector at a time, and 

pull the cables through until the socket rests in the hole.
To ensure proper orientation, the USB socket 

Ã

 should be on 

the top.

4

Place the nut over both the USB and 3.5 mm audio cables, 

thread it along the cables to the USB and 3.5 mm socket, and 

fasten the socket to the surface.

5

If necessary, route the USB cable to the stereo and connect it 

to the USB port.

6

If necessary, route the 3.5 mm connector cable to the stereo 

and connect it to the AUX IN 1 or AUX IN 2 port.

Stereo Information

Specifications

General

Dimensions (L × W × H) 99.6 × 235 × 66 mm (3.94 × 9.25 × 2.63 in.)
Weight

0.88 kg (1.96 lb.)

Water resistance

IPX3: Protected against spraying water when 
tilted up to 60 degrees vertically.

Operating temperature

From 0 to 50°C (from 32 to 122°F)

Storage temperature

From -20 to 70°C (from -4 to 158°F)

Input voltage

10.8 to 16 Vdc negative ground

Fuse rating

15 A

NMEA 2000 LEN

1 (50 mA)

Compass-safe distance 203 mm (8 in.)

Audio Amplifier

Output music power per channel

50 W

Total output music power

200 W

Speaker impedance

4 Ohm per channel

Total harmonic distortion (1 W output, 4 ohm load, 
from 20 Hz to 20 kHz)

0.04 typical
< 0.1% max.

Pre-output voltage

3 V peak

Current (standby with ignition off)

< 3 mA

Current (max.)

15 A

Current (muted)

< 800 mA

Inputs and Outputs

AUX IN 1 and 
AUX IN 2

RCA stereo line input for sources such as CD, DVD, 
and MP3 player

ZONE 3

RCA stereo line output

SUB OUT 

RCA dual mono line output (ZONE 3)

ANT

Motorola connector (standard AM/FM antenna 
connector)

USB

USB-A industry standard
Compatible with USB flash drives audio playback with 
supported audio formats and MTP devices
USB works with iPod touch

®

 (2nd through 5th 

generation), iPod classic

®

, iPod nano

®

(4th through 7th 

generation), iPhone

®

 5, iPhone 4s, iPhone 4, iPhone 

3Gs, iPhone 3G

Tuner

Europe and 
Australasia

USA

Japan

FM radio 
frequency range

87.5 to 108 MHz

87.5 to 
107.9 MHz

76 to 95 MHz

FM frequency 
step

50 kHz

200 kHz

50 kHz

AM radio 
frequency range

522 to 1620 kHz

530 to 
1710 kHz

522 to 
1620 kHz

AM frequency 
step

9 kHz

10 kHz

9 kHz

Registering Your FUSION MS-BB300

Help us better support you by completing our online registration 

today.
• Go to 

www.fusionentertainment.com

.

• Keep the original sales receipt, or a photocopy, in a safe 

place.

Getting the Owner's Manual

You can get the latest owner's manual and translations of 

manuals from the web.

1

Go to 

www.fusionentertainment.com/marine

.

2

Select your product.

3

Select 

Manuals & Downloads

.

FUSION MS-BB300 Installation Instructions

3

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