Question about Kenwood KAC-7201 Car Audio Amplifier

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I have a problem with my kenwood KAC 7201 power amp, I'm getting a rumbling sound out of my sub-speakers for some reason even with the volume all the way down and without RCA input cable hooked up, can you help me solve this problem ?

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  • Expert
  • 69 Answers

That sounds like your 12V wire is too light and please also run a ground wire directly next to the 12V wire.

Posted on Apr 19, 2014

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Posted on Jan 02, 2017

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SOURCE: KAC-7201 no sound from subs.amp is on.

It sounds like your amp is overheating.
Check to see if its location is well vented, in the past, I have had to install ports/ vents and sometimes fans, when an amp could not be relocated.
Good luck...

Posted on Feb 24, 2009

rteemon
  • 578 Answers

SOURCE: Poor sound/ Unable to play anything load without distortion.

i can tell you right now base on the vehicle you have a bad system hook wosrt if you are using factory head unit

Posted on Jun 26, 2009

  • 136 Answers

SOURCE: connecting subwoofer to kac-7201 kenwood amp

from your sub connect one short piece of cable from + on one side to - on the other side using the same diameter cable as you are running to the sub from amp . this will leave you with + and - on opposite sides of speaker these will then run to the amp +to+ and - to- on the mono side of connetor which is one left + and one - right and the amp switched to bridged

Posted on Sep 03, 2009

97F350diesel
  • 1326 Answers

SOURCE: I have a kenwood kac-8452 4 channel amp that makes

Its not pulsing, its called clipping. The sound is being clipped due the amp being pushed past is power capacity and distorting the signal. This will damage your speakers very quickly. No amp should be turned more then 3/4 up. If its not loud enough you need to purchase a larger amp or be comfortable with the wattage it produces at 3/4 volume. You may also have speaker wires touching/crossed causing th issue.

Posted on Sep 14, 2009

  • 21 Answers

SOURCE: Does an mp3 player put out enough power for input to KAC-624 amp?

Have you connected the rca plugs to the radio or amp directly? If you've connected it to the radio make sure that the input level controls are adjusted AND available on that model (it will say AUX, INPUT, SUBWOOFER, REAR, etc.) Connecting your mp3 player directly to the amp will not have enough juice to hear sound you need to connect it to the radio first.

Posted on Oct 02, 2009

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2 Answers

I have two 12 inch 1200 watt kenwood excelons and i want to bridge them to the amp but i can barely turn it up with out blowing fuses


Please check the impedance of those subs. Are they 4 or 8 ohm speakers? Do they have dual voice coils? this app may not be capable of handling dual voice coil four ohms and you're trying to bring it down to a 2 ohm mono.

Dec 19, 2013 | Kenwood KAC-7201 Car Audio Amplifier

1 Answer

Amp turns on but no sound from subs? everything is connected to thier proper slots. What could it be?


Check to see if your deck has a sub on/off option in the menu or settings if it don't you may have blown amp chanells or bad RCA preouts on deck or bad RCA in on amp

Feb 18, 2010 | Kenwood KAC-7201 Car Audio Amplifier

1 Answer

When I hook up my kenwood kac-7201 the power light


leave power connections hooked up disconnect rca and speaker wires if they still blow more than likely problem with amp

Dec 31, 2009 | Kenwood KAC-7201 Car Audio Amplifier

1 Answer

I have a kenwood kac-8452 4 channel amp that makes the speakers pulse after the volume gets turned up to 10. I also have a kenwood amp doing the same thing with my subs. any ideas?


Its not pulsing, its called clipping. The sound is being clipped due the amp being pushed past is power capacity and distorting the signal. This will damage your speakers very quickly. No amp should be turned more then 3/4 up. If its not loud enough you need to purchase a larger amp or be comfortable with the wattage it produces at 3/4 volume. You may also have speaker wires touching/crossed causing th issue.

Sep 10, 2009 | Kenwood KAC-8452 Car Audio Amplifier

2 Answers

Amp powers on but no sound!?


CHECK ALL YOUR POWER AND GROUND CONNECTIONS, THE SMALLEST PINCH WILL MAKE IT DO THAT.

Jun 18, 2009 | Kenwood KAC-7201 Car Audio Amplifier

1 Answer

Power lite on, no sound from amp after 1hr of usage


HI DUDE UR REMOTE WIRE FUSE IS BURNT .... REPLACE IT ... AND UR SPEAKER ... OR SUB TAKES LOT POWER FROM AMP .... ....

Apr 17, 2009 | Kenwood KAC-428S Car Audio Amplifier

1 Answer

How too hook my kac 7201 up to my two dual 4 ohm Alpine type Rs


Hello manbearpig65,

Well, that's a 2-channel amp, so it's really best used to power a set of regular speakers.

The best power solution, for your existing components, is to wire each of your subs voice coils in parallel, resulting in a 2 ohm load, and then run each sub off a separate channel from the amp.

The amp is stable only to 4 ohms in bridged mode, so you would series the sub voice coils (8 ohm load) and then parallel them (4 ohm load) to the amp bridged connection. This will result in less power to each sub than if you ran them separately.

Hope this helps.

Apr 10, 2009 | Kenwood KAC-7201 Car Audio Amplifier

1 Answer

Poor sound/ Unable to play anything load without distortion.


i can tell you right now base on the vehicle you have a bad system hook wosrt if you are using factory head unit

Mar 25, 2009 | Kenwood KAC-8151D Car Audio Amplifier

1 Answer

Connecting subwoofer to kac-7201 kenwood amp


from your sub connect one short piece of cable from + on one side to - on the other side using the same diameter cable as you are running to the sub from amp . this will leave you with + and - on opposite sides of speaker these will then run to the amp +to+ and - to- on the mono side of connetor which is one left + and one - right and the amp switched to bridged

Mar 22, 2009 | Kenwood KAC-7201 Car Audio Amplifier

1 Answer

KAC-7201 no sound from subs.amp is on.


It sounds like your amp is overheating.
Check to see if its location is well vented, in the past, I have had to install ports/ vents and sometimes fans, when an amp could not be relocated.
Good luck...

Feb 24, 2009 | Kenwood KAC-7201 Car Audio Amplifier

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