Question about Kenwood KAC-9102D Car Audio Amplifier

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Powers up- and turns off!

I have 2 9102D Car Audio Amplifiers set up in my car with 2 Alpine type Rs...One of them powers up perfectly, but the other one is giving me a hard time! It turns on, then turns off. Any suggestions?

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If they go in to protection mode the audio amplifiers IC's are damaged and you gotta to change him.Good luck

Posted on Jun 02, 2008

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1 Answer

Will it push 2 alphine type rs


no it could one 12 but no 2 and def not a 15 when mach speakers to a amp you want to mach up the rms power you want to amp to put out enough to power bolth speakers so like 2 500 watt rms you would want a 1000 watt rms amp

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Hello jreinhard623,

Check the speakers and wiring by substituting a known good speaker and check the amp inputs and RCA cables. Also make sure that the input gain and other controls are set properly. If there's still no sound, the amp itself is probably defective.

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Well, make sure that the output level on your head unit is up, and also try adjusting the gain NEVER EVER PUT IT ON FULL GAIN BECAUSE THAT WILL CLIP THE AMP AND MAY BLOW AMP AND/OR SUB!!!

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How too hook my kac 7201 up to my two dual 4 ohm Alpine type Rs


Hello manbearpig65,

Well, that's a 2-channel amp, so it's really best used to power a set of regular speakers.

The best power solution, for your existing components, is to wire each of your subs voice coils in parallel, resulting in a 2 ohm load, and then run each sub off a separate channel from the amp.

The amp is stable only to 4 ohms in bridged mode, so you would series the sub voice coils (8 ohm load) and then parallel them (4 ohm load) to the amp bridged connection. This will result in less power to each sub than if you ran them separately.

Hope this helps.

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Disconnect the speaker wires from the amp, then try it again. If the error message doesn't appear, try connecting the speaker wires back to the amp one by one.

The error message is due to some sort of overcurrent in the amp. If the error does not go away when the speaker wires are disconnected, the issue is most likely with the amp itself and will need professional repair.

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I would either try a bigger fuse, if possible, or turn the power output dial on the back of your amp down. This can be done with jus a simple flathead screwdriver. I suggestion would be to go out and buy a power monitoring cap. Wal-mart, or Tweeter usually distributes them. It'll have a LED reading on the top, with two wire hook-ups either on the bottom or the top for positive and negative, place this in between your amp and your subs in the wiring set-up.

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Did you set the digital output to the on position on the bottom of the head unit?

You have to switch the head unit off then back on for it to recognize the position of the switch.

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1 Answer

Powers up but no signal


Check your gain pots as well as audio pre outs on amp. sometimes pre outs will get loose and be unable to make a connection.

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