Question about Kenwood KAC-8452 Car Audio Amplifier

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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?

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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

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1.-check proper heat sink, or dissipation.
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or a booster amp that does it for you.
when you have a huge volume level, the coils will feed back (counter emf ) some of that power back into the transistors driving it.
some transistors can die if mismatched badly at power up with high volume level. or disconnect while runnning a load.
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hot plugging anything is taking a risk no matter.

see page 8 of your manual below
http://inform3.kenwoodusa.com/manuals/krx793.pdf

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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.


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1 Answer

Can you power 2-10" subs and 2-6x9 speakers with this amp?


You could but the only problem is even if you ran the speakers in parallel, meaning + to + and - to -, the best power you would get out of the amp is 230 watts per channel. Would probably make your 6x9 sound good but not enough to push your 10's.

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either bad ohm load or over heat if the ohs on the speaker wires to the amp are lower than specified use in the manual it will act funny cause it is pusing harder than its meant to and if it gets too hot either bad location or bad amp you can try turning the gain down a little until the amp stays on constantly at high volume

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They are not wanting to play like they should


Hello again debrahood196,

Your KAC-5204 amp is only rated to put out 60 watts per channel and really cannot push very hard. If your subs are the KFC-W110S, they are 8ohm subs and you will get better power from the amp by using the bridged connections, positive (+) on the left channel and negative (-) on the right channel. Wire both positives and both negatives from both subs to the bridged connections and the output will be 150 watts into 4ohms. Giving each sub 75 watts should make them push a little harder.

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2 Answers

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amps could be overheating or the subs could be requiring more power then the amps are giving off.

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2 Answers

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i had this same prob. & i run 2 amps as well, cameto find out i had a neg. & positive touching , so check all ur wiring for tht amp..

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You have blown outputs , faulty channels. What kind of amp do u have and what were u running to it? Most likely a bad amp, u might need a new one.

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OK I believe there is a small indented "Reset Button" around somewhere on the back of the unit, With the unit powered ON, & using a small diameter implement, straightened paper clip etc, press IN the button and this should "Reset" ya unit. This may indeed fix all your problems as the Unit "Reads" the speakers at turn on.

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