Question about Rockford Fosgate Punch P4004 Car Audio Amplifier
I have a Rockford Fosgate p4004 amp that has been in my truck for about 6 months, just 4 days ago it started going into safe mode if I turn the volme above 9. It is running my component speakers and I have another amp that is running my sub, that one is working fine.I have 5 guage wire powering it. What could be causeing it to click out? I have already pulled it out and checked to make sure there was nothing distorted on the bored and made sure all my wiring was tight but that hasnt helped.
Could be the sub has a shorted or rubbing voice coil, the speaker wires could have rubbed and touching or pinched with the chassis or ground, or the amp has a idle bias proble. The first two can be checked in the vehicle, the last one should be set up on a bench with a steady power supply and speaker load resistors attached and a osilliscope attached to the load resistors and a variable 400 to 1000 HZ tone at the input. You the raise the input and see where the waveform statrts to clip. If it starts to clip right away most likly there is a problem in the output or drivers or the connecting componets.
Posted on Sep 28, 2006
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