Installation - Wiring5
Amplifier Fuses
Although the amplifier has an internal fuse (s), additional fuse protection
should be installed as close as possible to the battery on the positive (+) power
wire going to the amplifier. An inline fuse should be installed at no more than
18" (46cm) on the positive (+) power wire. The rating of the inline fuse should
equal the value of the internal fuse of the amplifier if only the single amplifier is
connected to this wire. If other devices are connected to this wire, the fuse
value should be of sufficient capacity to handle the demand.
Wire Gauge
The amplifier accepts up to 8-gauge stripped wire at the DC power and ground
input terminals, and 8-gauge is recommended as a minimum. Wire runs should
be kept to the minimum practical length.
Power 12v and Ground (GND) Connection
Strip approximately 5/8” (16mm) of insulation. The positive (+) power wire is
installed into the amplifier terminal marked “12v”. The negative (–) wire is
installed into the terminal marked “GND”. The ground wire should be as short
as possible and connected directly to the chassis of the vehicle. Make sure that
the chassis connection point is free of rust, grease, dirt, paint, and other
materials that may insulate the ground wire from making proper connection.
Tighten the 12v and GND terminals with the supplied 3mm hex wrench to
secure the wire into the terminals. If the power wire must be routed through a
drilled or existing hole, use a nylon panel grommet to prevent the insulation
from fraying. Failure to do so could lead to an electrical short if the wire
insulation is worn through and the power wire is shorted to ground.
Remote Input Connection
Connect the REMOTE trigger lead from the head unit to the amplifier using the
3mm hex wrench to tighten the connector on the power block of the amplifier.
(refer to the diagram on page 3).
Speaker Output Connection
Prepare each wire by stripping approximately 5⁄8”(16mm) of insulation. The pos-
itive (+) speaker wires are installed into the amplifier terminals marked “SPEAK-
ER OUTPUT” / “+” (refer to the diagram on page 3). The negative (–) speaker
wires are installed into the amplifier terminals marked “SPEAKER OUTPUT” / “-
”. Tighten the “SPEAKER OUTPUT”, “+”, and “-” terminals with the supplied
3mm hex wrench (2mm on GTA-504) to secure the wires into the terminals. If
the speaker wires must be routed through a drilled or existing hole, use a nylon
panel grommet to prevent fraying the wire insulation. Failure to do so could
lead to an electrical short if the wire insulation is worn through and the speaker
wires are shorted to ground.
Note: Speaker outputs are marked “Front Output” and “Rear Output” on the
GTA-504.
Mono Subwoofer Operation
When the amplifier is configured for mono operation, use the speaker output
terminals marked for mono use (refer to the diagram on page 3).
WARNING! Subwoofer impedance must not fall below 4 ohms when in
MONO mode.