Question about Kenwood eXcelon KDC-X759 CD Player

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Subwoofer my kenwood subwoofer continues to blow fuses

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Check your wiring. Sounds like you either have a ground wire issue or a have wires crossed.

Posted on Dec 31, 2007

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Posted on Jan 02, 2017

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Mission m-cube sub fuse keeps blowing


If you have replaced with the correct rating and the fuse blows off then you will need to check for higher current drain in the sub woofer or the network. After replacing the fuse load up the subwoofer slowly, reduce the bass and as you increase check at the point the fuse blows off. Now we need to analyse if the rating of the amplifier you are using is rated for the subwoofer. If your subwoofer has a higher rating you can increase the rating by about 25% and check again. Some amplifiers give a very higher voltage on full bass which could result in such a condition. Moderate this and check again. If the fuse stays Ok you can continue with this new rating.Otherwise the output of the amp at higher volume needs a confirmation. Hope this helps. Good day

Jul 20, 2010 | Mission M-CUBE System

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My subwoofer keeps blowing the 3 amp fuse on the main power supply


There's an overload in either the power supply section or the amp part of the subwoofer. Overloads are mostly caused by a semiconductor that has shorted (acting just like a piece of wire). Transistors are easy to test with a multi-meter in this condition. For when you put the Ohm meter probes on each leg it will act like you are touching the probes to just one leg.

Feb 18, 2010 | Kenwood SW36HT Subwoofer

1 Answer

I have a kenwood kac-728s and two coustic 10in. subwoofers hooked to it and every time i start my car and the radio powers on the two 20 watt fuses on the amp blows.any ideas?


That is pretty much saying that the amp's power supply is shorted or at least has a low resistance path to ground which is causing the fuses on the amp to blow. The amp has protection circuitry to prevent damage to the output stage so that is not what is causing this. Is the amp new?

Dec 30, 2009 | Kenwood KAC-728S 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

Blown fuses


I agree with the last answer- your amp has built in fuses that should be rated at 30 amperes each which should be sufficient as the amp only pulls 60 amperes at full power-however you may want to upgrade your power /ground wires to a good 4 gauge set if you dont already have it set up like that-throw an 80-100 amp fuse up front by the battery in case your running another amp for mids and highs just to cover the current draw of the amps combined. If the amp is still blowing fuses after that check to make sure that your subs are wired to no lower than a 2 ohm load as the amp is only stable to 2 ohms.

May 11, 2009 | Kenwood KAC-9152D Car Audio Amplifier

1 Answer

Polk Audio PSW202


The power supply or amplifier has a shorted component.

Nov 08, 2008 | Polk Audio PSW250 Subwoofer

1 Answer

Kenwood KAC-X1R and one 12" Kenwood KFC-XW1222D at 1 ohm blow out.Why is that happening?


You may have a high resistance in your positive or negative power supply. with your amp you need to use at least a 2 gauge power cable. Is your fuse blowing? if so then a short circuit to ground may be causing that.
Good luck

Aug 01, 2008 | Kenwood Car Audio & Video

1 Answer

Have a kenwood kac849 600w amp keep blowing fuse on amp as soon as power is too it power wire got wet and now this can i bypass that fuse some how


It would be very dangerous to bypass a fuse. If it keeps blowing, bypassing the fuse will only create lots of internal damage and maybe a fire as well. The fuse is blowing for a reason, the amplifier is not going to somehow start working because you bypassed the fuse. You also need to stop trying to turn it on, every time it blows the fuse, it keeps stressing the components inside. You have a shorted power supply, probably water damage as well since the power wire got wet.

I repair car amplifiers for a living, and can tell you with all honesty that bypassing the fuse would be a terrible mistake to make, the amplifier would end up being un-fixable with holes burned right into the board.

Please, just take it in for service or get a new amplifier. That is the only sensible thing to do. The amp will not start working bypassing the fuse, it will only start smoking.

Jul 10, 2008 | Kenwood Car Audio & Video

3 Answers

No sound


good day, check your spkr impedance, if 4oms use a posive spkr dividing network. if stills blows up replace a higher amperage of your fuse. ex.4A raise it up to 5A. the your amps consume higier current if more spkr wattage.

May 29, 2008 | Kenwood KAC-5203 Car Audio Amplifier

2 Answers

Power Light off & speaker not working


I had the same problem. The screws around the perimeter of the back plate must be unscrewed and the plate must be pried off as it is glued to the box. When replacing my fuse, 2A 5x20 GMA, it blew the fuse again. Disconnecting the second circuit board prevented the next fuse from blowing, but now the question is what is wrong with the circuit board? I cannot see any damage or shorts.

Oct 10, 2007 | Kenwood SW-38HT Subwoofer

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