Question about Kenwood KAC-X650D Car Audio Amplifier

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Kenwood KAC - X650D

My amplifier has worked without any problems and was installed by a professional installer. Wiring is perfect i.e. power supply etc. The amp went into protection mode. I removed and took to local auto stereo shop (very high end known for service and custom install etc.) They sent the amp in to Kenwood for repair. It has been returned and NOT repaired with an explanation: To much "corrosion". I removed the back panel and it there appears to be no corrosion what so ever. Any suggestions on other options to have it repaired? Or what to look for? Any way to "reset" the amp?

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6 Suggested Answers

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SOURCE: kenwood KAC-PS201T

The first thing you must do is to confirm that you have voltage at the amp. Just because the fuses look good, that doesn't mean you're getting power to the amp.

With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp 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.

Posted on Jan 22, 2008

  • 14 Answers

SOURCE: kac-ps201t problem

I had a similar problem with a KAC-X812D Kenwood amplifier.
My problem turned out to be that the RCA inputs were so sensitive, they picked up interference from my head unit through the RCAs.
I replaced the head unit with a newer model, and had no problems after.

This may not be your case, but hope it helps.

Posted on Dec 17, 2008

  • 655 Answers

SOURCE: To bridge a Kenwood KAC-9102D

Hello laurogleal,

The Kenwood KAC-9102D is a mono amp. There is no bridging. Having two sets of terminals is just a more convenient way of connecting two subwoofers. The amp is stable down to 2 ohms impedance, so it is safe to run 2 4 ohm loads in parallel.

Hope this helps.

Posted on Apr 28, 2009

  • 4 Answers

SOURCE: amp goes dirctly into protect

ok well it could be two thing wrong your amp dont have a good ground or your amp is a smar amp and your subs must have to be hooked up so the power from the amp cn go to the subs so the amp can see that you do have subs hooked up to take it out of protect o and look at your fuses to to smal or to big will send it to protect to

Posted on May 19, 2009

  • 96 Answers

SOURCE: want to bridge my subs I have a kenwood kac-719

from what i have read about your amp, it is already a mono amp, and rated for 2 ohm's, so all you have to do is wire the subs in parallel (both positives together to positive and both negatives together to negative) or series/parallel if you have dual voice coils (both positive and both negative paired on each sub, then positive from amp to positive on one sub; negative on that sub to positive on next sub; then negative on sub to negative on amp) Note though, with two dual voice coil subs, you can have a 1 ohm load with the first set up, which can damage your amp. Let me know if this helps :)

Posted on Jun 11, 2009

  • 9 Answers

SOURCE: KAC-8070 kenwood 4-channel power amp

Audio section
Max Power Output (4 ohms, 1kHz)
Rear 70W + 70W
Front 35W + 35W
Max Power Output (4 ohms, 1kHz, 10% THD)
Rear 45W + 45W
Front 25W + 25W
Max Power Output (4 ohms, 1kHz, 1& THD)
Rear 37W + 37W
Front 20W + 20W
Frequency Response (-3dB)
Rear 2 Hz ~ 100 kHz
Front 5 Hz ~ 50 kHz

Posted on Jun 24, 2010

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Hello opey_69a,

Here are the troubleshooting steps for fuses blowing.
1) Remove all wiring except ground, power and remote and see if the amp powers up without blowing the fuses. If it does, the problem is in the input cables or speaker wiring.
2) The use of loudspeaker impedances below the recommended minimums will cause the amp to draw excessive current - check.
3) A shorted or grounded RCA cable may cause the fuses to blow - check.
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1 Answer

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Hope this helps.

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1 Answer

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Yes, try replacing the fuses first. If that doesn't work, then I'm sorry to say that you most likely fried your amp.

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1 Answer

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Well, the sad thing is, it can be a number of things. You will have to do a process of elimination. Try replacing the amp first, borrow one off a friend. Second try replacing the subs. If those don't work, read the manual to your deck. Find the audio settings, and check to see if the sub section is "on".

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1 Answer

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YOu might have burned out the inner fuse. Better yet the source connect...

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1 Answer

Install my Kenwood KAC-9102D in my 2006 Acura RSX Type S

You will probably need to use a Line Output Converter (LOC). They're available at virtually any shop that sells car audio.

Many times, the outputs of the OEM amplifier will have significant DC voltage on them. This could damage the input circuits on the kenwood amplifier.

Let me know if you have any other questions.

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1 Answer

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I'm no expert, but the two most obious problems that come to mind would be the power supply or amp over heating.  Test your battery and alternator..

Oct 28, 2007 | Kenwood KAC-X650D Car Audio Amplifier

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