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

  • 2 Answers

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Posted on Jan 02, 2017

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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

  • 1175 Answers

SOURCE: KRF-5030D i stand by mode

Does it go into standby when it's in another mode like : Cd or Video 1 or tape?

When you state that you checked the power amp IC's , how so did you do this?

Thanks n' let me know.

Posted on Mar 17, 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

  • 5 Answers

SOURCE: Kenwood KAC-8103D Power Amplifier wont turn on

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

  • 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

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Kenwood KAC-8103D on and off problem

it sounds like the power wire might be grounding out somewhere that you dont know of it could be by the fuse link so I would say put electrical tape on any exposed wire on the fuse link first if that don't work try change the power wire.

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Can i run just 2 subs on this 1200 watt kenwood 5-4-3 and if so what way will i get the most power, i mean do i bridge it or pute the speaker wires in other ports

you can run 2 subs given that you dont go over 2 ohms of resistance and that the subs are rated at 1000 watt max each around 4 or 500 watt rms. if your not sure about ohms dont bridge it and get single voice coil subs. this amp is capable of about 700watts constant power 1200 max spike if the voltage stays at 12 or higher.

Feb 05, 2010 | Kenwood KAC-X650D Car Audio Amplifier

1 Answer

Kenwood KAC-729S keeps blowing fuses. Checked all cables, re-ran power, remote, and ground. All good, still blows them at power-up.

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.
4) If an amplifier fuse blows continually, with only +12 volt, ground and remote leads connected, the amplifier is probably defective, most likely shorted output MOSFET's. In this case the amp needs professional repair or replacement.

Hope this helps.

Sep 19, 2009 | Kenwood KAC-729S Car Audio Amplifier

1 Answer

On a kac-x650d does the power light stay on or flash

Hello mpredday,

The Kenwood Excelon KAC-X650D power light is ON during normal operation. It blinks blue to indicate BMS selection, yellow for low voltage, purple for DC voltage on the outputs, red for overheating, and green for a shorted or grounded speaker wire.

Hope this helps.

Jul 29, 2009 | Kenwood Car Audio & Video

1 Answer

Amp overheated

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

Jun 06, 2009 | Kenwood KAC-X650D Car Audio Amplifier

1 Answer

Kenwood 9102d wont power on

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

Nov 06, 2008 | Kenwood KAC-9102D Car Audio Amplifier

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.

Aug 24, 2008 | Kenwood KAC-9102D Car Audio Amplifier

1 Answer

One amp dies.. then revives

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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