Question about Kenwood KAC-X401M Car Audio Amplifier

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I turn on the amp then the fuse blows??

I have a Kac-x301. I turn on the stereo the amp turns on then I hear the fuses pop? I checked my ground(good) and tried another amp with same hook-up wires(fine). So I conclude it has to be something with the amp??? Please help, I'm scratching my head. Justin

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Re: I turn on the amp then the fuse blows??

First thing you have to do is check MOSFET transistors.once you'll open the amp you'll notice some burnt areas around them or melted transistor legs.try to replace them in most cases it does help

Posted on Feb 09, 2011

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Re: I turn on the amp then the fuse blows??

Are your subs blown? mine did the same thing when i blew my sub and didnt no it

Posted on Mar 23, 2009

Re: I turn on the amp then the fuse blows??

If your KAC X401M is broken, I will buy it. I need parts. respond to studioz at

Posted on Dec 18, 2007

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Re: I turn on the amp then the fuse blows??

If the fuse only blows after the remote voltage is applied, the amplifier probably has shorted output transistors.

Posted on Dec 01, 2007

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My kenwood KAC-7204--- the wiring is hooked up right, I just got a 2000 watt max sub 1000 watt rms, i was running the amp in bridge mode and it ran for 1 day than it turned off. I checked it and the fuse...

when i was running my sub off bridge mode this kept happening to me. I ended up just running two subs and for some reason the fuse stopped blowing. i think there is something wrong with these amps.

Jun 04, 2011 | Kenwood KAC-7204 Car Audio Amplifier

1 Answer

KAC-8104D Car Audio Amplifier: Fuse keeps blowing why...

Most likely a bad ground connection, clean up where the ground is connected to the vehicle, check the power wire connections too, if that doesn't help route the ground wire to either the chassis or the battery to get a lot better connection, also possibly if you have the amp on full gain (max power) it may be getting a surge from your vehicle which means turn to down a little or get a capacitor.

May 16, 2010 | Kenwood KAC-8104D Car Audio Amplifier

2 Answers

Amp blows fuses

Are you using the correct fuse? if so,
more then likely, you don't have a good ground. Try grounding to something else that has more direct connection to your frame. If that doesnt work, try getting larger power cables.
I had the same problem with my 2500w xplodes all I had to do was get a thicker cable for the ground and battery connection. What was happening, was it was needing more power then the wire and fuse could handle, so it would blow the fuse, since the higher you have it, the more power it needs to feed the watts.
I would try grounding it directly to the frame on a good part of the frame before spending another $70 on new power cables though.

Mar 09, 2010 | Car Amplifiers

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

Blowing fuses on the Vosonik VB101PK

ok, always use ground and positive from speakers to the amps +/- . Make sure the amp is not grounded. Some amps are made of metal and will ground itself. When ever any fuses pop, this means that something somewhere got grounded. If using metal srews to mount amp that has a metal casing, chances are you will pop a fuse or two. Be careful ajusting the speaker wires with a metal srewdriver, I've done that alot. "POP"

Jun 21, 2009 | Visonik V117SX Car Audio Amplifier

2 Answers

Amp powers on but no sound!?


Jun 18, 2009 | Kenwood KAC-7201 Car Audio Amplifier

1 Answer

My kenwood kac-7251 car amp

My first adivse is to check to make sure there are no power to ground shorts or any shorts for that matter. Then, a possibility would be if you have too small of fuses. Make sure you put the correct fuses in in amp according to the manufacturer's specs and the fuse under the hood should be size of your fuses on your amp added up plus a little extra. Meaning if you have 2 25A fuses on your amp then you probably want around a 60A. What ever you do don't put bigger fuses in the amp than the manufacturer specifies or you will cause damage if something gets shorted. Another possibility is that you could have the speaker impedence too low and the amp isn't stable at the impedence you have it at. I hope I could help. Let me know if you need me to specify more. Good luck
-Andrew Hawkins

Aug 26, 2008 | Kenwood KAC-7251 Car Audio Amplifier

1 Answer

Keep Blowing Fuses

Sounds like the amp is shorting somehow. You are obviously shorting out somewhere between the battery and the amp. Are you sure you grounding location is a good one? is the fuse blowing only when you turn the stereo on? Something is not hooked up correctly.

If the fuse at the battery is blowing then it's a short.

If the fuse on the amp is blowing then its probably a bad amp.

Jun 12, 2008 | Kenwood KAC-728S Car Audio Amplifier

1 Answer

Keep blowing fuses

Check for shorts to ground in the speaker wiring, the speakers themselves, total Impedance, especially woofers. Proper size power and ground wire and all connections. Use a Ohmmeter or find a friend with one that knows how to use it, If all else fails RMA .
Good luck, sumthin

Jun 10, 2008 | Kenwood KAC-7202 Car Audio Amplifier

2 Answers

Kenwood 7202 Amp that is blowing fuses

If your speakers are wired for an impedance below 4 ohms mono or 2 ohms stereo, that would make it shut off. If you have a speaker wire shorted to ground, it would also cause the amp to go into protection.


If the speakers are not the problem, it may be shutting down because the voltage at the amp is dropping too low.


Oct 19, 2007 | Kenwood KAC-7202 Car Audio Amplifier

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