Question about Kenwood KAC-729S Car Audio Amplifier

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I have a kenwood kac-729s 600 watt amp. i've hooked everything up right and my amp will not so much as power on. what may the problem be besides it's no good

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  • jayhood88
    jayhood88 Dec 12, 2012

    i have a 03 kia optima it still has it standard stock cd deck. cd player didn't have RCAs jacks so i bought the output level converter box and hooked it up to rear speakers and ran to amp. i've also tried the power to the remote thing as well while it was hooked up and it still never even turn the little light on top of the amp on.

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Posted on Jan 02, 2017

  • 149 Answers

SOURCE: power amp wont power up

Check the fuses-should be a pair of 30 amps on the side. use a paper clip and jump power from the power+ to the remote+ and see if that lights it up-if it does than your remote lead isnt giving it juice-

Posted on May 12, 2009

smarthome2
  • 1114 Answers

SOURCE: I have the kenwood kac-8104d amp and it lights up

Check your RCA's from the amp to the deck, make sure it's on an output not an input on an aftermarket deck,and the input, not the pass thru on the amp. If you have it hooked up to a factory deck, you've opened a whole new can of worms! If its a factory Deck; Post the make and model of the unit if you can find it, as well as the vehicle year make and model. I get as much info as I can on it and walk you thru the details. If it's aftermarket and you've checked the above, post the make and model of the deck and I'll do the same. Hope this helps

Posted on Jun 24, 2009

etirbynnor
  • 655 Answers

SOURCE: Kenwood KAC-729S keeps blowing fuses.

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.

Posted on Sep 20, 2009

iadame
  • 676 Answers

SOURCE: i have a kenwood 600 watt kac-7285 hooked up 2 my highs

use bass blockers or use a crossover.

Posted on Nov 17, 2009

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1 Answer

How to install kenwood 729s withno rca outlet on radio


You can run the speaker wires to the speaker level input on the amp or i believe you can run another set of speaker wires spliced into the existing wires in parallel to the speaker level input along with the speakers that are already hooked up if you are using the amp for a sub or other speakers that you have added to the existing system.

Apr 14, 2014 | Kenwood KAC-729S Car Audio Amplifier

1 Answer

Blows both 20 amp fuses when powered on


Sounds like the power supply could be bad in the amp. If it were an output stage problem it would go into protection.

Dec 17, 2009 | Kenwood KAC-729S Car Audio Amplifier

1 Answer

The subs aren't pushing out bass.


Hello crobins2,

The Kenwood KAC-6202 2-channel is only rated for 60 watts RMS per channel into a 4 ohm load. That just isn't much power for a pair of 12" subs. Even the bridged output is only 200 watts into 4 ohms, still at the low end for a sub, much less to share between a pair of subs.

Assuming that your subs are 4 ohm, you could probably get more sound by driving just one of them on the bridged terminals. But to get the best power with what you have, connect one sub to each channel, set the filter switch to the far right (LPF), set the operation switch to stereo (both channels driven), set the filter frequency (Hz) to 100 or lower, and adjust the input sensitivity as far clockwise as possible without causing distortion.

But, to do the subs justice, you really need at least 300-400 watts to share between them.

Hope this helps.

Sep 27, 2009 | Kenwood KAC-6202 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

Keep popping fuse


you got short in the curcuit

Apr 03, 2009 | Kenwood KAC-7202 Car Audio Amplifier

1 Answer

AMP DOES NOT POWER UP


if it dont smell blown then make sure your fuses in the amp are good and the fuse to the power is good

Mar 24, 2009 | Kenwood KAC-729S Car Audio Amplifier

3 Answers

Adjusting wattage on kenwood kac 9103 class D mono amp


That amplifier is 900W x 1 @ 2ohms.
If your subs are 4ohm SVC wired Parallel, resulting in a 2 ohm load, each sub will only see 1/2 of the rated power. (450W ea.)
Your gain (sensitivity) setting should be between 75% and 85% to max. You will be fine.

Jan 02, 2009 | Kenwood KAC-9103D Car Audio Amplifier

2 Answers

Kenwood kac-9152d


by jump do you mean all it does is thump and no sound besides thumping noise? if so put a better ground on your amp, double grounds work the best. please reply

Oct 06, 2006 | Kenwood KAC-9152D Car Audio Amplifier

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