Question about Kenwood KAC-7252 Car Audio Amplifier

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My KAC-725 amp is not working. when i turn on the key it lights up then gos off and dosnt make my subs come on. what can i do to make it work?

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6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: my Kenwood KAC 9152D 1800W AMP acting funny

I sent my amp back for repairs and aparantly i blew 4 transistors and they said that it's a common problem for an amplifier. really annoying yeah.

Posted on Apr 08, 2007

  • 216 Answers

SOURCE: Kenwood KAC-929

From the Input of amp, just connect cheap speaker with wires to input of amp.

If you have sound from speaker, most likely the amp is bad or loose connection.

Posted on Dec 26, 2007

geo_tech486
  • 27 Answers

SOURCE: Amp light turning off and on

if you see that happen you might need to your i c sound chip or your trasistor change then and check

Posted on Dec 11, 2008

  • 68 Answers

SOURCE: kac - 929 kenwood 1000 watt amp

Does it do it when car is not moving? If it does'nt then it is a bad connection in the amp itself or outside the amp. Check all your external connection well, it is easy to pass a bad connection up without knowing it. I recomend checking every connection, redoing the connections. Then you can rule that out and may find the problem. If connections don't fix problem let me know i'll be glad to help. I have my own amp repair business and people send me there amps from all over the U.S. Just send me a message and
I'll take you thru some steps to diagnose the amp if problem persists after connection checks. Good luck, hope to hear from you!

Posted on Aug 02, 2009

  • 30 Answers

SOURCE: amp light is on but no power to my subs!

Hi There.

When you say the 40 Amp fuse blew. Was it your mains battery fuse or was it the fuse on the amplifier? If it was the fuse on the amplifier then you may have hurt the amplifier. The Kenwood KAC-8101D is a 1000 Watt monoblock amplifier. Therefore if you say that 1 of your woofers is not playing, then it is almost certainly blown if you are sure it is connected correctly. Try disconnecting it and only running the woofer that tries to play. If this woofer is still working correctly, you will notice a drastic drop if the sound of your bass. The reason for this is because you have changed the impedance load on your amplifier due to the fact that the other woofer is not working. Have your working woofer checked and replace the faulty woofer then you should be banging again.

Hope this helps!!

Posted on Aug 19, 2009

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1 Answer

I have a kenwood kac-9152d amplifer and it works just fine for about 10 minutes then just shuts off and subs dont work, about 30 seconds later my amp turns back on with the subs.


make sure it's well ventilated. If there's no air flow, then there is no way of cooling down and to protect itself it will shut off. Make sure the speakers are wired correctly as per amp specs. too many subs or subs connected improperly can draw too much current and shut the amp off, but you will notice this when you turn up the volume to a certain point and the amp shuts down.

Aug 30, 2011 | Kenwood KAC-9152D Car Audio Amplifier

1 Answer

Alpine amp wont turn on..


your power wire is sufficating yor amp probably

Jul 29, 2009 | Kenwood KAC-8152D Car Audio Amplifier

3 Answers

KAC-9102d no sound, Amp powers on but no sound to the subs.


If the sub isn't working, you won't get a pop. All you need is a small speaker. Don't need a sub, you just want to test the sound. I recently blew 2 subs, no smoke, no smell, no sign of being blown. Absolutely nothing from the subs.... In the past my sub locked up. You can take your sub out of the box and hook the + and - to the battery to see if you can get the sub to pop there. I believe a small box will push a sub into a deep excursion to the center of the cone. I have 2 lanzar VW12D's that just quit. I hooked a 6 x 9 up to my amp and low and behold I had sound! Try that and see what you get...

Feb 07, 2009 | Kenwood KAC-9102D Car Audio Amplifier

1 Answer

Kac-8152d powers on, but no power output to subs


Well, the sad thing is, it can be a number of things. You will have to do a process of elimination. Try replacing the amp first, borrow one off a friend. Second try replacing the subs. If those don't work, read the manual to your deck. Find the audio settings, and check to see if the sub section is "on".

Jan 29, 2009 | Kenwood KAC-8152D Car Audio Amplifier

1 Answer

Kenwood KAC-8401 light goes from blue to red when turned on


Either the amp is ad or the sub got shorted? You can check itby disconnecting the Sub and seeing if the amp comes on blue then. If yes, then the sub is shorted. If no, then the amp is shorted. Also chck the voltage AT THE AMP. Make sure that it is above 12 Volts.

Larry T
Winona Lake, IN
http://www.cybersoundsaudio.com/cybersounds/vehiclepics.html

Dec 29, 2008 | Kenwood KAC-9152D Car Audio Amplifier

1 Answer

I need help


Most of the time if the red light is on the amp is no blown but some times it does this cause the subs are hooked up in the wrong way. If the amp is only 2ohm stable and you hook the subs up to it at 1 ohm than the amp will not work so I would check this frist.

Oct 17, 2008 | Kenwood KAC-9152D Car Audio Amplifier

1 Answer

Kenwood KAC-749S


Try to take out the lights that you put in yourself, but do it carefully, as you might have bridged out the power connectors that go through to your subs.

Mar 28, 2007 | Kenwood KAC-749S Car Audio Amplifier

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