Question about Jensen JPA285 Car Audio Amplifier

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Amp problem ok so i initially touched two wires together and of course the amp shut off and i let the amp sit reset itself for a coulpe of hours and it worked again but once i got the wires hooked up i started to turn up the radio and the amp cut out and wont turn back on,  i turned off the car and then turned it back on and the jenson light on the amp was on (very dim), but the power light for the amp was off and the stand-by light wasnt even on so whats the diagnosis for my amp doc? did i just loose my amp or what?

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Check connections/wiring before ditching the amp. May just have gotten a loose or bad connection, or may have a short-out somewhere that got disturbed if you were driving it, or tucking wires away.

Posted on Dec 03, 2008

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Its fried, yo!!! you prolly fried the main capacitor, so it may be repairable, but costly. if you fried an ic chip, just forget about it.

Posted on Nov 28, 2008

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If the amp is in protect mode, it probably has shorted output transistors. To eliminate other possible problems, do the following. I'll assume that you've checked the amplifier's on-board fuses.

With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp (not on the point where the ground wire connected to the vehicle) and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low.

If the voltage remains near or above 12v, disconnect all speaker wires from the speaker terminals of the amp and disconnect signal cables from the amp. If it powers up, the wiring needs to be checked. If it still shuts down, the amp almost certainly has shorted output transistors and will need to be repaired.

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If the wires were touching then the amp overworked itself into a early grave..What happends when they touch is the amp goes from seeing a 4 ohm load to seeing a 0 ohm load. You can imagine why this would be bad for a amp...usually the amp should shut off to protect from damage and I would assume that Rockford would. Right now im having a similar problem..I suggest your call rockford and ask to talk to a technical advisor ( the name escapes me) and ask him what he thinks.

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