User / Installation Manual
Marine Amplifier
FM-402
Contents
Feature Overview
Feature Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 3
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2 Ohm Stable MOSFET Amplifier Design
Variable Bass Boost 0 - + 12dB
Control Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 6
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 6
Inputs and Gain Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 7
2 Channel Installation / Trouble Shooting . . . . . . . . . . . . . . . . . . . . Pg 8
3 Channel Installation / Power Cable Calculator. . . . . . . . . . . . . . . Pg 9
4 Channel Installation / Specifications. . . . . . . . . . . . . . . . . . . . . . Pg 10
Variable LP and HP Electronics X-OVER @ 12dB/octave
FUSION Regulated Amplifier Technology (F.R.A.T.)
FUSION Intercooled Semi-conductor Technology (F.I.S.T.)
Gold Plated 4 Gauge Power and Ground Connections
Gols Plated Audio Input and Output Connections
FUTRANZ Efficient Heat Sink Transfer Technology
Gold Plated RCA Output for multi-amp Installations
What sets FUSION apart?
The FUSION FM series amplifiers come complete with FRAT power supplies, FIST cooling system and FUTRANZ. Also
all marine amplifiers use heat-tempered PCB’s for maximum product life and performance. Gold plated connectol-
ogy, ensures your signal flows from the head unit through to the speakers with as little injected distortion and
noise as possible. This results is a very clean and very powerful reproduction of the input signal. All these features
make it easier to achieve sonic perfection in almost any installation.
FUTRANZ
RECORD YOUR PRODUCT DETAILS HERE:
In developing extremely powerful amplifiers, it is essential to keep things cool so FUSION developed a heat sink
that has a heat dissipation ability like never before. This was not an easy task but none the less it was achieved,
another important factor is efficiently transferring the heat from the semi-conductors to the heatsink, conven-
tional designs use a white paste as the interface between these devices and the heatsink, this is not a perfect
solution when complete surface coupling is required. So all Marine Ampliers come equipped with a composite heat
transferring tape. Core heat in semi-conductors causes distortion and poor component performance characteris-
tics. Testing has shown a massive reduction in core heat has been achieved by using the FUTRANZ heat transfer-
ring technology. In simplified terms this means excellent thermal stability and maximum component reliability.
MODEL NUMBER
DATE OF PURCHASE
AFFIX RECEIPT HERE
F.I.S.T (fusion intercooled semi-conductor technology)
FIST is an innovative method of clamping down all internal power switching and audio output devices with an
aluminium extrusion that has extremely low temperature co-efficiency. By using F.I.S.T it creates the perfect cool-
ing solution, rapidly removing core heat from all associated semi-conductors from both sides of the device at once
resulting in extremely low distortion an excellent thermal stability
F.R.A.T (fusion intercooled semi-conductor technology)
FRAT is a regulated amplifier design, FUSION regulated amplifiers allow an enormous amount of output power at
the lowest voltage (12.6 Volts) and extreme output at 14.4 volts.
2010 Version 1.0
Set the crossover switch 2 to HP and turn this control to 65Hz or above when using speakers smaller than 6
x 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.
Control Descriptions
7
Bass Boost:
This is a variable control to increase the bass boost at 45Hz from 0 -+18dB of gain, adjust to suit.
8
9
Subsonic Filter:
This is a variable control filters out all Sub Bass Frequencies below the set point at 18dB/octave.
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.
1
2
3
4
5
6
7
8
9
10
11
10 RCA Input:
Connect these RCA connectors to the rear LOW LEVEL output connection from the head unit.
11 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.
14
12
13
15
16
12 Ground Connection:
Connect directly to a suitable ground point via a 4 gauge power cable. NOTE: This is to be the first wire to
connect when wiring up amplifiers. Damage could result of this is not done.
1
2
3
4
5
Bass Remote Selector
13 +12V Connection:
Use this switch to activate or deactivate the (optional) FP-BASS controller.
Bass Remote Connector
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.
This port allows connections to the (optional) FP-BASS control.
Power And Status LEDs:
14 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 the ACC position on the key.
this shows if the amplifier has been correctly powered up and if any faults are present.
Crossover Selector:
15 Fuses:
Set the appropriate mode of operation. The 3 positions available are OFF, LP and HP. See points 5 and 6 below.
Please ensure the correct type of fuse is fitted, as specified in this manual. PLEASE NOTE: the FM-402 has 1x
25A fuses.
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.
16 Speaker Output:
See 2/1 channel installation diagrams in this manual for correct speaker connection.
6
High Pass:
over the screw and bare metal to prevent rust. Now its time to connect the power and ground cables to the amplifier. Cut both
cables to length. Crimp the yellow spade connectors supplied to the power and ground. Use a hex type screwdriver to loosen the
+12V and the GND connections on the amplifier. Terminate the ground first, and then the +12V and please make sure that you
terminate them into the correct terminals. Then tighten the screws down securely.
Installation
Mounting
Appropriate mounting is very important for the prolonged life expectancy of any amplifier. Select a location that allows enough
space so sufficient airflow is maintainable and a location that provides protection from moisture. Keep in mind that an amplifier
should never be mounted upside down. Upside down mounting will compromise heat dissipation through the heatsink and
could engage the thermal protection circuit. Excessive heat will shorten your amplifiers life. To maximise heat dissipation, be
sure to leave at least 2.5” of clearance around the amplifier. If space is of the essense and the amplifier must be mounted in
an enclosed or restricted area, a small 3 inch fan should be used in correspondence with a duct so the heat can flow past the
FUTRANZ Heatsink. Try to avoid mounting any amplifier on a subwoofer enclosure, as extended exposure to vibration may cause
malfunction of the amplifier.
Speaker Load
Keep in mind FUSION ‘FM’ series amplifiers are high power amplifiers and not high current amplifiers. In other words they require
a minimum impedance of 2 ohms STEREO and 4 ohms bridged MONO to operate trouble free. Too low of an impedance could send
your FUSION amplifier into protection mode and/or damage the amplifier.
Remote Turn-on
This terminal must be connected to a switched +12V source. Typically, remote turn-on leads are provided at the head unit which
will turn on and off the amplifier in correspondence with the source. If the head unit does not have a remote turn-on lead, then
a power antenna wire can be used. If neither of these leads are present on the head unit then a switched +12V supply must be
used , like the ACC +12V.
To avoid scratching your new FUSION amplifier, pre-drill the mounting holes with either a 3mm or 9/64” diameter drill bit and use
the screws supplied in the accessory kit. Be sure to investigate your mounting area thoroughly to avoid electrical wires, vacuum
lines and brake or fuel lines.
Run a minimum of 18 gauge wire from the amplifier location to the source of the switched +12V lead. If possible, route this wire
on the same side of the vehicle as your power cable. Connect the source remote output to the wire. Go back to the amplifier and
cut the wire to length. Loosen the screw terminal marked REM on the amplifier using a hex type screwdriver. Slip the wire into
the connector and tighten the screw securely.
Installation Options
The quality of installation will affect the performance and reliability of your FUSION amplifier. For maximum performance we
recommend you have your new FUSION amplifier installed by an authorised FUSION dealer. Our highly skilled dealers have vast
knowledge of our products and their installation techniques are necessary to unleash the high performance capabilities of your
amplifier.
Speaker Wiring
Choose the correct speaker wire for your application. Most application will require a minimum of 16 gauge. Route these using the
same precautions as you did when you ran the power cables. Terminate these wires at the speaker end using insulated speaker
terminals (not supplied) or by soldering the connection. Make sure the speaker connections are positive to positive and negative
to negative. At the amplifier end, use a #2 Phillips screwdriver to loosen the speaker terminals on the amplifier. Connect the
speaker wires and tighten the screws securely. Check to make sure you’ve maintained proper polarity and balance.
If you decide to connect the amplifier yourself, it is important that you read this manual carefully and throughout before start-
ing. Once you have finished reading and you still have questions regarding installation, we recommend your FUSION dealer.
Connection
FUSION amplifiers are designed to work within a 10 to 16 volt DC range. Before any wires are connected, the vessel’s electrical
system should be checked for correct voltage supply with the help of a voltmeter. First, check the voltage at the battery with the
ignition in the OFF position. The voltmeter should read between 12 and 13.8 Volts. If your vehicle’s electrical system is not up to
these specification, we recommend having it checked by an auto electrician before any further installation. Once the vessel is
checked, make certain the correct cable size is used. We recommend using the following cables calculator diagram on page 8 to
calculate the correct power cable for your application.
Inputs & Gain Setup
Low Level Inputs
Be extra careful with your RCA interconnects. Hiss, engine noise, and fan noise can easily be picked up through RCA cables if run
incorrectly. Avoid running your RCAs near large wire looms and electric fans if possible. Run your RCA cables on the opposite side
of the power cable. Be sure to check for correct balance (Red is right and black or white is left)
Power
Level Control
FUSION amplifiers should be wired directly to the battery using the appropriate sized cable. Start at the vehicle battery and run
the power cable through to the amplifier. FUSION recommends the use of grommets when passing the power cable through any
metal wall to avoid sharp corners or sharp body parts that may easily cut through the insulation on the cable.
On the amplifier, is the LEVEL control, this control allows you to match the input level of the amplifier to the output level of your
head unit. Matching the input can be accomplished in three simple steps:
Avoid running the power cable over engine components and near heater cores. The use of an inline fuse or circuit breaker is
a must, this will prevent the risk of a potential fire caused be a short in your power cable. Connect the fuse holder or circuit
breaker as close to the battery positive terminal as possible. Use a fuse or circuit breaker of equal value as that found on the
chassis of your FUSION amplifier. You may now connect the cable to the battery, but remember to leave the fuse out or circuit
breaker off until all other cable connections are made.
1. Turn the LEVEL control on the amplifier to minimum.
2. Turn up the head unit and adjust to 2/3 maximum volume ensuring that the BASS and TREBLE are set to zero.
3. Adjust the LEVEL control until the desired volume is achieved without audible distortion.
Remember, the gain control is not a volume control. Ignoring the three steps above may leave you with damaged speakers and/
or a damaged amplifier.
Ground
When grounding your FUSION amplifier, locate a metal area close to the amplifier that is a good source of ground. Once again,
investigate the area you wish to use for electrical wires, vacuum lines, and brake or fuel lines. Use either a wire brush or sand-
paper to eliminate unwanted paint. This will supply a better contact for your ground. Use the same gauge cable for ground as
you did for the power. Secure the ground cable to the appropriate ground point using a bolt, star washer and nut. Spread silicon
All
1 Channel Installation
2 Channel Installation
FUSE
FUSE
PLEASE NOTE: The crossover selector positions
PLEASE NOTE: The crossover selector positions
Power Cable Calclator
Trouble Shooting
Total Amperage
0-20
0-4ft
14
12
10
8
4-7ft
12
10
8
7-10ft
10-13ft
13-16ft
16-19ft
19-22ft
22-28ft
12
8
10
8
10
6
8
6
4
4
2
2
0
0
8
6
4
4
2
2
0
0
8
4
4
2
0
0
0
0
Problem
Cause
Solution
20-35
Replace with correct fuse. Typically twice the rating of the fuse that
is on the amplifier
Fuse at battery blown or not installed
35-50
8
6
4
Power LED not ‘ON
Check that the ground wire, power wire and the remote wires are
connected to the correct terminal
50-65
8
6
4
4
Improper connections
65-85
6
6
4
4
2
Fuse or amplifier blown
Amplifier too hot
Replace with the correct AMP rated fuse
85-105
105-125
125-150
6
6
4
2
2
Move the amplifier into a more ventilated area
4
4
4
2
0
Check that there are no speaker wires shorted to any other wire and
also check if any wire is shorted to the vehicle chassis
Status LED ‘ON’
Speaker wires shorted
Internal malfunction
2
2
2
0
0
Disconnectallwiresexceptground, powerandremote. Thenturnthe
amplifier’ON’, iftheprotectionlightisstill’ON’thenreturnforservice
The above chart shows cable gauges to be used, if no less than a 0.5 volt drop is acceptable. If aluminium wire or tinned wire is used, the gauges should be of an even larger
size to compensate. Cable gauge size calculation takes into account terminal connection resistance. 1 Metre = 3.28 Feet
Specifications
Bandwidth
Signal to Noise
Separation
10Hz - 40kHz
>95dB
>60dB
12.6 Volt power output specification
50 Watts RMS x 2 @ 4Ω 1% THD+N
96 Watts RMS x 2 @ 2Ω 1% THD+N
Input Sensitivity
LP Variable Crossover
HP Variable Crossover
Variable Bass Boost
Variable Subsonic Filter
Input Impedance
Damping factor
T.H.D
300mV - 8V
160 Watts RMS x 1 @ 4Ω Bridged 1% THD+N
40Hz - 160Hz @ 12dB/octave
40Hz - 600Hz @ 12dB/octave
0 - + 18dB @ 45Hz
20Hz - 55Hz @ 18dB/octave
20KW
14.4 Volt power output specification
65 Watts RMS x 2 @ 4Ω 1% THD+N
100 Watts RMS x 2 @ 2Ω 1% THD+N
200 Watts RMS x 1 @ 4Ω Bridged 1% THD+N
>200
0.05%
Fuse Ratings
1 x 25A
Dimensions(mm)
220 (W) x 260(L) x 57.5(H)
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