Rockford Fosgate 4-CHANNEL AMPLIFIER owner manual Amplifier gets too hot

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 as described on page 14. Using an AC impedance meter (Perfect Interface IM-1), sweep from 20 Hz - 20 kHz, and look for dips below the 2Ω rating.

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 bad speakers and/or crossovers, proper use of passive crossovers, 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 the unit on and off. 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 infor- mation.)

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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