Question about Kenwood KAC-8101D Car Audio Amplifier

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How do you determin how many farad capacitor you need for your car system?

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  • pelikant75 Apr 14, 2009

    Do you mean per 1000 watts?


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You only need one farad per 1000 amps

Posted on Apr 13, 2009

  • davis9427 Apr 16, 2009

    sorry, yes.


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Crosley CR2405B , cassette player worked ,,, now it does not , very little use,,, I just hear a hum

There is a swollen capacitor in the power supply section that needs to be replaced.
Replace it using the same farads and volts.If you cant get the same capacitor value that use get one that has the Farads but voltage can be the same or abit of a higher value.
Good luck and thanks for using Fixya.


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Hi there,
After a bit of searching I found the instruction manual:

Hope it helps.

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It's beeping when turned on. Why?

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1 Answer

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1 Answer

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Aug 13, 2009 | Car Audio & Video

1 Answer


You usually don't need a capacitor because your car can keep up with the power requirements, especially since your system isnt too big (no offense). But if you wanted to get one, i would only get a 1/2 or 1 farad cap.

Jul 26, 2009 | Legacy LA588 Car Amp

2 Answers

Lights dimming

Your lights are dimming because your system is pulling too much current from your car. Your battery provides long-term sustained power, but your system wants to draw power faster than your alternator and battery can provide it. When the amp attempts to draw more amperage than the battery and alternator can produce, it creates a voltage differential in your system, which attempts to steal electricity from the rest of your system (like your lights). The most common solution for lights dimming is to add some level of adequate capacitance to your car. Capacitors store electricity and deliver it quickly to your amps as needed. Capacitors resist voltage changes by producing large amounts of amperage. This means that the capacitor(s) will provide the electrical bursts that your amps want so that it doesn't have to steal it from your lights. You can start out with 1.0 Farad, if the problem doesn't go away, add another one, and so on until the problem is gone. You cannot have too much capacitance, it's just an electrical buffer for your audio system.

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1 Answer

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There's hundreds of capacitors in an amp... The value should be printed right on them. It will have a Farad rating (F) or usually MICRO farad (uF) and a voltage rating (V). Looks like "16V 47uF"... Be aware that there's likely to be more problems than just the caps...

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