Question about Kenwood KAC-7251 Car Audio Amplifier

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Need help my amp blows my fuses & gets real hot quick

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If the fuses only blow after remote turn-on voltage is applied to the amplifier, the amp probably has shorted output transistors. If that's the case, they will need to be replaced.

If you're interested in repairing it yourself, read through the following page.

Amplifier Repair Primer

Let me know if you have any other questions.

Posted on Aug 27, 2008

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what wattage are the subs and amp? if your subs are more wattage than your amp, your amp will blow fuses as cant handle the output to your subs. for example. you have 2 500 watt subs and a 300 watt amp, that is no good as amp isnt powerful enough. if you have 2 500 watt subs you need at least a 1200 watt amp to power them both. 200 watt more than the combined wattage of subs as amps should never be turned up to max as they tend to blow and overheat more quickly. 80% volume on amps is reccomended by installers and manufactures.

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My amp gets real hot and then turns off, what is the problem? Also If i choose to the setting of "Low Pass" as the filter option, would this blow subs?


Your amp is getting hot possiblily due to under power? of the amp. First try to turn the gain down (sensitivity) see if that helps, if not then add a fan to the amp to cool it. Also put the amp in an area where air runs freely....

Low pass means that it is allowing low frequency to pass by so No it won't blow your subs but it will hit certain frequencies!

Sep 15, 2010 | Car Amplifiers

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Amp getting hot sound distorted fuses blown wires not touching


make sure that you have installed a wire fuse inbetween your battery and your amplifier that is the most common reason for blown fuses. without that extra fuse your amp is getting a non limited amount of power from the battery.

Jun 02, 2010 | Kicker IX702 Car Audio Amplifier

1 Answer

Fuses


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

Amp blows fuses "immediately"... HELP


for this to cause a problem with amplifiers there is something internally wrong with it. Most of the time the mosfets take a shit from the hot...cold....hot....cold atmosphere its put in by all of us audio people. If it still has warrenty that would be the easiest route to go. Send it in to them and have them fix it for FREE lol!! well sorta. Hope this helps you understand why you are blowing fuses.

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Fuse keeps blowing when sub volume is turned up


the amp draw rating on the amp is 100 you need to put a larger fuse in, such as a 150 amp, it would be a good idea to go to 0 ga but not needed. you might also want to upgrade your altenator.

Nov 29, 2006 | Jl Audio 1000/1 Car Audio Amplifier

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