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Problem
Amplifier gets too hot.
Solution
1. Be sure the amplifier is properly mounted. You should be able
to place your hand a few inches above the amplifier housing and
feel the heat rising when the unit is on.
Hot air rises. Consequently mount the amplifier with the heatsink
fins aligned vertically. This allows the air to flow freely, carrying
away the heat. Check to see that the heatsink fins are free of any
obstruction (i.e., carpet, seats, etc.).
2. If #1 does not solve the problem, check to see that the impedance
of the overall system is not less than 2Ω stereo or 4Ω bridged/
mono. Using an AC impedance meter (such as the Perfect
Interface IM-1), sweep from 20 Hz-20 kHz, and look for dips
below 2Ω.
Be sure to test the bass region (20 Hz - 150 Hz) of your system.
If the amplifier is bridged to those speakers, the load the amp sees
is one-half (1/2) of the reading on the AC impedance meter.
If the impedance level is below 2Ω, check for a bad speaker and/
or crossover, proper usage of passive crossovers or shorted wires,
or try rewiring the entire system.
Problem
Amplifier noise (Turn-On Pop)
Solution
1. Disconnect the RCA plugs from the amplifier and recheck the
amp by turning it on and off with the source unit. If turn-on pop
goes away, connect a delay turn-on module (Perfect Interface
DT-1) to the amplifier. See your Authorized Rockford Fosgate
Dealer for more information.
2. If the noise persists, disconnect the turn-on wire from the head
unit and use a different +12 volt power source to turn on the
amplifier (i.e., battery direct). If the noise is gone, use a relay to
switch +12 volts auto power from the clean power source.
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