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Wiring Instructions
The preferred method of bringing input signal in to the amplifier is with
RCA cables from a quality tape or CD player. A high level (speaker) input signal
may also be used if your factory deck or aftermarket source does not have
low-level RCA jacks.
Some of the system possibilities are shown in the System Diagrams section
of this manual.
When working with power connections always hook up the ground wire first
and disconnect the ground wire last. Never make any wiring changes with the
amplifier powered up.
The in-line fuse on the" positive battery connection is to protect the wire in
the event of a short circuit. Install a fuse of at least as high of a value as the
amplifier requires within 18 inches of the battery connection. An in-line fuse
valued at 30A with 10 gauge wire are recommended for the 354xi, a 60A
fuse with 8 gauge wire for the 654xi. Note: if the wire run is much longer than
10 feet and the amplifier is being used either in 2 Ohm stereo or bridged to 4
Ohms, it is recommended to use 8 gauge wire for the 354xi and 4 gauge wire
for the 654xi. This may require a power distribution block near the amp to
adapt the wire size back down to the recommended gauge to make
connection at the amp easier.
Any time that a power wire goes through a metal panel such as the firewall,
or if there is any chance of abrasion, it is necessary to use a grommet or
other suitable form of protection to avoid shorts.
The ground wire should be as short as possible and attached to the body of
the vehicle. The ground point must be clean and free from paint and
corrosion.
To reduce the chance of noise entering the
system it is recommended that the RCA cables
be run through the vehicle separate from any
power wires.
Mounting the IMPULSE Amplifier
After determining an appropriate mounting
location which provides good air circulation and
access to the end panel controls, use the
supplied screws and washers to firmly mount
the amplifier. The amplifier chassis may be used
as a template for the screw locations. Check to
make sure that the mounting screws will not
damage any components on the back side of
the chosen panel.
If a vertical mounting surface is chosen, it is
recommended that the heatsink fins run vertically as shown at right.
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