Question about Kenwood KAC-7201 Car Audio Amplifier

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Blowing fuse My amp turns on, but when I go to connect it, it blows the fuse. How can I determined the problem and can it be something that I can spot and fix on my own.

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  • mutiny71 Feb 05, 2009

    my amp is the kennwood KAC-7201 800W, 2 10 inch kickers. but I have to amps, one for the front speakers which is another kennwood amp also KAC-8401; any my speakers r fine not blown. I actually opened the amp up to check if i can spot anything.

  • Anonymous Mar 24, 2009

    CLose to the same problem except that I haven't connected the speakers to the amp yet, but everytime I change the two 30 amp fuses on the side and turn on the power the light on the amp comes on for about a second and then blows the fuses. Any ideas what could be causing this? The amp has worked fine for the last year and just started doing this about 3 weeks ago.

  • Mark Skinner May 11, 2010

    Hello, I repair amps for a living and get a lot of business thru If your fuses are blowing when you turn on your amp try unhooking the spaekers, I guarantee the fuses will still blow. Thats why there is a protect mode to sense these problems. If everything is hooked up properly than it's internal and is going to need repaired. Sounds like the power supply has shorted out somewhere. Probably some power supply mosfets. If it makes you feel better hook the subs up to the other amp to see if they work on that amp. Better yet get a volt meter and check the ohms of your speakers just to make sure. But I guarantee you your speakers are not the problem. If interested in getting it fixed I am the cheapest repair shop anywhere. I have a website but its under construction from my old one. I'm up dating everything. It's We are in the process of moving to a bigger facility with more bays to install more audio systems. I also own a business installing car audio/video systems. Let me know if ytou want it repaired. I can give you references from people wwho sent me amps from reading my posts on Good luck and please vote so I can get out of this apprintice status. I have 15 years of experience doing this .


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Most of the time, when you connect it and it blows a fuse, one of the speakers are blown or you have too high of a power demand than the amp can put out.

Can you put more detail in to your question so I can answer it more appropriately? What kind of speaker, what kind of sub, the wattages, etc.

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When I connect my 2nd sub, the amp blows fuses. Each sub plays fine individually.

Does your fuse blow when volume turned up, or does it blow straight away when turned on? What watt is your subs and amp?

Mar 04, 2011 | Power Acoustik OVN2-800 Car Amp

1 Answer

It keeps blowing a fuse

Generally, if you are using the manufactures fuse rating you can use a slightly higher rating and it will resolve the blowing fuses. Fuses supply resistance, if there isn't enough resistance you'll fry the system board in the amplifier. But if you have 25 amp fuses installed, install 30 amp, if you have 30 install 35 amp, 35 install 40. Anything higher will damage the amp.

Hope this helps.

A rare chance, something may be internally wrong with the amp and shorting it out which will blow the fuse.

Use the incorrect wiring of subs to the amp, you'll blow fuses and damage the amp from it turning off consistently. The amp should be running at 2 ohm stereo stable or 4 ohm mono stable.

Very few amps are designed to run at 1 ohm or less. Not to mention the subs can't handle it.

Jul 28, 2010 | Power Acoustik TS980-2 2 Channel 980W...

1 Answer

Soon as i try to connect the power and ground starts sparking and my fuse blows by the battery. I changed the ground cause i thought that could be it plus i tryed installing it in another car that had an...

your inline fuse wouldn't blow if there was just something wrong with the amp. the amp fuse would blow if that was the case. something is faulty with your wiring. you probably have the wires touching somewhere or are in the wrong terminals at the amp or on the wrong battery terminal. or your power wire is grounding out somewhere. its not the amp. its your wiring

Mar 16, 2010 | Car Amplifiers

1 Answer

Is my amp getting burnt out, it keeps blowing fuses

sound like you have a a bad spkr connect the spk one by one to amp and play the system and you will know and make sure the spk can handle the load from the amp too''

Jun 19, 2009 | Kenwood KAC-9152D Car Audio Amplifier

1 Answer

Keep blowing fuse under hood when i put power wire in to amp

disconnect the negative battery terminal, replace the fuse with all the wires hooked up to the amp and reconnect the battery terminal, that way the initial surge of power goes through the negative terminal and not your inline fuse. That should solve your problem.

Mar 29, 2009 | Pioneer GM-5200T 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


If you connect the fuses in parallel yes. You can use 12v circuit breakers as long as they are the same fast/medium/slow blow speed as the fuses the manufacturer recommends.

Thing is that most standard fuses are not made to exact standards and one of the two might blow earlier than the other which then in turn wil blow. I would go for either a 40 amp single fuse made for something other than a car situation and place that in the power line or get a 12v circuit breaker

Jan 11, 2008 | PPI2360 Car Audio Amplifier

2 Answers

Blowing fuses

Here are some answers:

1. Make sure your amp does not have a higher amp rating then the fuse, For example, an 18 amp amplifier will blow an 15 amp fuse, so connect it to a 20 amp fuse

2. you have a connection issue, where something is shorting out

3. you are pushing the amp or car to it's limit with how loud you put it, and thus blowing it, fixed by getting a more powerful amp and a better fuse.

4. or there is something very wrong and cannot help you and you would have to bring it into a shop.

Nov 18, 2007 | Car Amplifiers

1 Answer


Hi, when the fuses blow it can only mean that the current the passed thru it is greater than its rating. It is possible that the fuses installed has a lower rating than is required by your amp. To check look over the specs of your amp and determine the proper amperage (amp) rating. Specs may be found on a sticker at the bottom or side of the amp and may look something like 12V-20A meaning 12 volts 20 amperes. In the absence, you may want to check the box and/or the instructional manual that came with it ot go to the manufacturer's website to checkout the specs. If you are referring to the fuse serving all your amps, players, receivers, etc, then you have to addup all their individual A rating and get a fuse whose rating is equal to the addedup value. Although this is not a sound practice and individual fusing is preferable. If the amp rating is equal to the fuse rating but it still blows, then you may want to have your amp checked. Trying to install a higher rating will most likely prevent fuses blowing and present itself as a temporary solution but the real problem is not solved and may be aggravated. Hope this be of some help and good luck.

Apr 22, 2007 | Lanzar VIBE286 Car Audio Amplifier

2 Answers

Blowing fuses under hood but nothing looks smoked in the amp

Sounds like the amp is fried, most likley in one or both of the output sections. Good luck.

Feb 21, 2007 | PPI DCX-1500.1 Car Audio Amplifier

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