Question about Kenwood KAC-7202 Car Audio Amplifier

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Amp blow a fuses

My amp is blowing all the fuses, i already check the ground, the volts, the fuse rating, everything is ok, I don't know what is wrong?

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Re: amp blow a fuses

Your amp is dead you moust going to the center service

Posted on Aug 21, 2007

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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

2 Answers

Mackie 1200/1400 blows all 4 10 amp fuses

missmatched impedance, insufficient ground, blown transistor.

Jul 20, 2009 | Bob Mackie Mackie M-1400i Power 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

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

2 Answers

Amp keeps blowin the two 30amp fuses on the amp.

Make sure that the speaker wires are wired correct at both the amp and the speakers......otherwise it sounds like the typical death of a power acoustik amp (great amps, but prone to a premature death)

Mar 29, 2009 | Power Acoustik GOTHIC OV2-1200 Car Audio...

2 Answers

Car amp blows 12 volt wire fuse

the wire from your battery is blowing fuses? and you are using 20-30 A fuses? mine has a 100A fuse..look into getting new wire plus my wire is 4 gauge.., 1600 watts is too powerful for a 12 g wire and a 30 A fuse

Jul 26, 2008 | Car Amplifiers

1 Answer

40amp fuse blows

Measure the DC voltage across the B+ and ground terminals as well as across remote and ground. If you have less than 11 volts when the amp tries to power up, the amp could be shutting down due to low voltage.

If the voltage remains near or above 12v, disconnect all speaker wires and signal cables from the amp. If it powers up, the wiring needs to be checked. If it still shuts down or blows the fuse when you apply remote voltage (turn the head unit on), the amp likely has blown output transistors.

Nov 24, 2007 | Rockford Fosgate P3001 Car Audio Amplifier

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

1 Answer

Blown fuses

I used to have one of those amps also (nice amp btw) Did you try another fuse of the same size?
Is it blowing fuses everytime you put one in or did it just blow that one fuse ?
Is the conection on the battery solid and clean of corrosion build up? Because that is a good amp and if wired properly shouldnt blow out or anything and so if the speaker is not blown then maybe connection is weak somewhere? I would try disconnecting the speakers from it and try a new fuse and if it does not blow the new fuse than amp is ok? and if it does blow the new fuse right away then there must be a short somewhere in the wire or the amp. then disconnect the fuse again and reconnect the speakers and if the fuse blows with the speakers connected but doesnt blow with them disconnected then you know it is a blown speaker causing the problem.

Just currious but what size fuse do you have connected at the battery?

Jan 06, 2007 | Rockford Fosgate Punch P4004 Car Audio...

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