Question about Earthquake Sound PH-D2 Car Audio Amplifier
Check speaker load. You might try starting with a 4ohm load per channel. Only one speaker per channel and DON'T bridge. If it now works OK then you are on the trail of the right answer. Good luck. If it is a speaker load problem, then you need to correct this at once before you fry your amp. Good luck.
Posted on Jun 18, 2007
Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.
Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.
In your case it is obviously not heat, speaker load or excessive volume at the moment.
You could unplug it then turn it upside down and shake it to see if something metallic is rattling around inside it. Maybe open it up and sniff for burnt components, but even if you see something obvious and replace it you migh not know what the original cause for failure was, so you may just be wasting time and sacrificing new parts.
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In most of Rockford's amps, the low voltage detection is connected to the remote input. If the remote voltage is too low and they use the same circuit on this amp, it could trigger the protection circuit.
Disconnect the head unit's remote from the amp. Use a fuse holder with a 3 amp fuse to jump between the B+ connection and the remote terminal of the amp. If the amp powers up, the head unit's remote output may be defective. If it blows the fuse, the remote input or part of the power supply is damaged. Do not try it with an unfused jumper.
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