Question about Kenwood KAC-628 Car Audio Amplifier
Red light comes on and no audio output can put a good working amp in my truck and good amp works
The red light you describe on your amp, is the protection mode warning light. An amp goes into protect for many reasons. Here's a checklist.
1st check the fuse (s) on your amp and make sure they are not blown.
2nd check the inline fuse next to your car battery (if you have an inline fuse)
3rd, disconnect the speaker wires with amp on, does the light go off?
4th check your ground, this may be ok if you have tried another amp with the same wires.
5th.if none of these turns the protect mode off, it may be an internal fault.
you may have blown transistors and it is a tricky job to repair and costly.
Posted on Jan 30, 2013
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Posted on Jan 02, 2017
SOURCE: kenwood kac 859 amp
The amp will reset every time it's turned off. The red light flashing, instead of staying constant is a warning that one of the protection circuits are activated. If the amp is bridged wrong, it can do this. If the load impedance is too low, it can also do this... don't trust the speaker, it it says 4-ohm, it may actually be 3.8-ohm, which could cause a problem if two speakers are wired in parallel. If it's not getting enough power, it will turn off briefly, but will turn back on after a second. A capacitor is not necessary with this, just use 4 gauge cable and have a good battery... make sure the ground is good, that one is commonly ignored.
Posted on Aug 21, 2007
it sounds to me like its burnt.but with some amps the screws that hold it in place have to be screwed into the car chassisfor grounding. be careful not to srewe into hidden wires.
Posted on Apr 15, 2009
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