Fusion MS-AM402, MS-AM504 User & Installation Manual
MS-AM402
MARINE AMPLIFIER
User/Installation Manual
FUSIONENTERTAINMENT.COM
Contents
Feature Overview ....................................Pg 3
Control Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg 4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg 6
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg 6
Inputs and Gain Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg 8
Single Channel Installation .............................Pg 8
Two Channel Installation / Power Cable Calculator...........Pg 9
Trouble Shooting / Specifications .......................Pg 10
RECORD YOUR PRODUCT DETAILS HERE:
MODEL NUMBER DATE OF PURCHASE AFFIX RECEIPT HERE
2010 Version 1.0
Feature Overview
• 2 Ohm Stable MOSFET Amplifier Design
• Variable Bass Boost 0 - + 18dB
• Variable LP and HP Electronics X-OVER @ 18dB/octave
• 4 Gauge Power and Ground Connections
• Nickel Plated Audio Input and Output RCA Connections
• Nickel Plated RCA Output for multi-amp Installations
2-OHM STABLE STEREO
Provides the option of connecting an extra pair of speakers in parallel, 2
per channel at 2-Ohms (A total of 8 speakers).
MARINE GRADE CONNECTIONS
Nickel plated RCA connectors and stainless components improve signal
flow for optimum output
003
FEATURE OVERVIEW
CLASS-AB DESIGN
The 500 Watt 2-Ohm stable (per channel) design ensures clean and
powerful amplification of the input signal, enough to rock the boat.
CONFORMAL COATED CIRCUITRY
Provides added protection from salt air and moisture to ensure maximum
product life.
MARINE GRADE CHASSIS
Stainless steel end and bottom plates provide a stunning finish coupled
with environmental protection.
RCA LINE OUT
A pass through RCA output enables linking of multiple amplifiers for
enhanced system performance
Control Descriptions
CONTROLS
004
2
1
10 11
12
4
3
13
14
9
8765
1 Power And Status LEDs:
This shows if the amplifier has been correctly powered up and if any faults are present.
2 Crossover Selector:
Set the appropriate mode of operation. The 3 positions available are OFF, LP and
HP.
3 Low Pass:
Set the crossover switch 2 to LP when a subwoofer is connected. Ensure the crossover frequency is set at 100Hz or below, this feature is designed to filter all mid to
high frequencies that only FULL RANGE speakers should produce. NOTE: Failure to
do so could result in speaker damage.
4 High Pass:
Set the crossover switch 2 to HP and turn this control to 65Hz or above when using
speakers smaller than 6”, this feature is designed to filter all low bass frequencies
that only SUBWOOFERS should produce. NOTE: Failure to do so could result in
speaker damage.
5 Bass Boost:
This is a variable control to increase the bass boost at 45Hz from 0 -+18dB of gain,
adjust to suit.
6 Subsonic Filter:
This is a variable control filters out all Sub Bass Frequencies below the set point at
18dB/octave.
7 Level:
This allows level adjustment of the input signal. Use this control to correctly match
the head unit to the amplifier. To set this control correctly, turn the amplifier level
to MIN and the head unit to 3/4 volume, with the BASS and TREBLE on zero , then
slowly turn up this amplifier level control towards the MAX end of the control.
NOTE: If the sound becomes distorted, turn this control down.
8 RCA Input:
Connect these RCA connectors to the LOW LEVEL output connection from the head
unit.
9 RCA Output:
Use these RCA Output connectors to connect to a secondary amplifier. This output
is a PASS-THRU connection derived from the RCA input connector so the signal
level and frequency response are the same as the original input signal.
10 Ground Connection:
005
CONTROLS
Connect directly to a suitable ground point via a 4 gauge power cable. NOTE: This
is to be the first wire to connect. Damage could result if this is not done.
11 Remote Connection:
This input is for turning the amplifier on and off. This requires a switched positive
(+12V) to power ‘ON’ the amplifier, this can be found on the rear of the head unit in
the form of an electric antenna output, or a remote on output. If not available you
can wire to a switched +12V supply.
12 Power +12V Connection:
This must be connected to the battery positive (+) terminal via a 4 guage power
cable and with an inline fuse or circuit breaker at the battery end. NOTE: This is to
be the last wire to connect up during installation as damage could result.
13 Fuse:
Please ensure the correct type of fuse is fitted, as specified in this manual. PLEASE
NOTE: the MS-AM402 has 1x 25A fuse.
14 Speaker Output:
See channel installation diagrams in this manual for correct speaker connection.
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