I purchased a Dual head unit a year or so ago from BestBuy. Around 3 months ago, my volume suddenly began acting up and when i turn the volume knob counterclockwise to lower the volume, it became louder and is not stuck on the max volume. So now, i can't turn it on to listen to music or the radio since im afraid i will blow my speakers. Does anyone have an idea of what may have caused this problem? Any help is greatly appreciated. Thank You. (by the way, BestBuy wont do anything since i lost my receipt from a year ago, and apparently, they don't have any record whatsoever of my purchase on any of their computers??? B.S.)
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Check the fuse in the amp. There should also be a fusable link that houses a huge fuse, if that blows it will give the same effect. You will want to check to make sure that the wire that runs from your battery to the amp is secure and free of corrosion as well. If all of the above is fine, then I would recommend that you check to see if the rca cables are plugged in securely in the head unit.
DID THIS JUST HAPPEN ALL AT ONCE ? OR DID IT GRADUALLY HAPPEN? CHECK GROUND FROM AMP , INSTALL ONE FARAD CAP . STOCK RADIO ISNT REALLY HELPING , MOST AMPS OF TODAY TAKE A HIGHER SIGNAL FROM HEAD UNIT . ADD ONE FARAD CAP AND SEE
your amp is likely over heating.Does it have enough air space around it? You may be over driving it does your head unit have variable out put? if so try lowering the output volume to the amp Hope this helps...........Good Luck!
Have the speaker checked out and if it checks good you need to take the amp back to the repair center and have them test it better. Most repair centers have a 30 day warranty on the work they perform. Make sure they know what the problem is in detail, so they know how to check it properly. But my first thought is the speaker could be faulty. You can check the speaker yourself by switching them at the amplifier. If the same speaker sounds bad you know it is the speaker that is bad. If the sound is bad from the other speaker, then the amp is bad unless it is coming from the head unit. You can also switch the RCA input jacks after that and see if the problem changes speakers, if so, the RCA output of the head unit is bad, but that is less likely.
If the amp still goes into protect mode, the easiest thing to do is disconnect the RCA cables from the amp and see if still goes into protect mode (after turning off/on). If it does, the issue lies in the amp or the wiring to/from the amp (most likely case). Check to make sure no speaker wires came loose and touched +12V or ground (car body). From the sound of it, my guess is something internal to the amp died and will need repair.