Question about Kenwood KAC-848 Car Audio Amplifier

2 Answers

Kenwood KAC-848 amp not working

My old trusty Kenwood just went mute as I was driving. The power light comes on, but there's a *pop* coming from the speakers in a steady half-a second interval without any other signal. Also at the exact time I hear the *pop* the power light flickers once. I have no idea what this problem can be, since my grounding is fine (it worked before) and AFAIK I haven't overheated it.

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  • Bug This Oct 11, 2007

    The power light of the amp flickers, that is

  • Anonymous Apr 29, 2008

    As i drove for a few seconds my Kenwood amp emitted a popping noise that persisted for a while, as I checked my amp I noticed that the power lights was blinking on and off, I bought a new wiring kit but that didn't help,

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2 Answers

Resolder all connections on the mainboard to the transformer and to the speaker jacks. Also check the emitter resitors.

Posted on Jun 05, 2008

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  • Master
  • 631 Answers

It sounds like the amplifier is going into protection mode. This is generally due to shorted output transistors but can also be caused by shorted wiring. Disconnect all of the speaker wires and signal cables from the amp. If it still does the same thing, confirm that you have adequate voltage across the B+ and ground terminals (at least 11 volts DC). If the votlage acrosss the terminals is OK and the light still flashes with no speakers connected to it, the amplifier is in need of repair.

Posted on Oct 11, 2007

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Posted on Jan 02, 2017

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