Connecting to Power
CAUTION
The wiring (not included) from the power source to the amplifier must run through an inline fuse or circuit
breaker (not included) as close to the power source as possible. You must connect the positive wire to the fuse
or circuit breaker. Connecting the amplifier to power without an inline fuse or circuit breaker may result in a fire
if there is a short in the cable.
If the amplifier is powered by a battery, use a breaker or fuse rated to protect a cable of the gauge used to
connect the amplifier to the battery. See the American Boat & Yacht Council (ABYC) standards for the required
fuse or breaker rating.
If the amplifier is powered by a source other than a battery, use a breaker or fuse rated no higher than the max
current of the power source.
You should use 4 AWG (21 through 25 mm
2
) marine-grade, fully-tinned copper wire (not included) to connect
the amplifier to power and ground for most installations. For long power-cable runs, you should consider using
larger-diameter (smaller gauge number) wire to minimize power loss.
You must connect the REM terminal on the amplifier block to either the AMPLIFIER ON wire from the connected
stereo or to a constant 12 Vdc power source using a switch.
NOTICE
Connecting to the AMPLIFIER ON wire is recommended to avoid damaging your speakers when the stereo
turns on or off.
1 Route 4 AWG (21 through 25 mm
2
) marine-grade, fully-tinned copper ground wire (not included) to the
amplifier and to a ground location on the boat.
2 Using a 5 mm (
7
/
32
in.) flat (slotted) screwdriver, connect the ground wire to the GND terminal on the power
connection block.
3 Connect the other end of the ground wire to the ground location.
4 Route 4 AWG (21 through 25 mm
2
) marine-grade, fully-tinned copper power wire (not included) to the
amplifier and to the power source, and select an option:
• Install a properly rated in-line fuse on the power wire as close to the power source as possible.
• Identify or install a circuit breaker, as close to the power source as possible, for use with the amplifier
power wire.
CAUTION
Connecting the amplifier to power without the proper inline fuse or circuit breaker as described above and in
the specifications section may result in a fire if there is a short in the cable.
Fusion Apollo Multichannel Amplifiers Installation Instructions Installation Instructions
9