So I toar apart a old amp, found a 22,000 uf capiactor. I know thats double the suggested, is that too much?

 

Not trying to be a grammar ****, but fixed it for people that will look

 

Nothing is ever too much, use it.

 

You'll have the ability to store more energy...I don't see nuttin' wrong with that.... make certain the polarity is correct.

 

the voltage rating needs to be high enough. probably at least 20VDC for a reasonable factor of safety. higher is fine.

 

Its rated for 25V, its a monster haha. Alright cool, I get it so the cops an just take energy from the capiactior as needed, so there is no too big. cool.

 

Yup. When using a capacitor as a voltage stabilizer for a heavy load at the end of a long cable run, bigger is always better, right up to the point where it blows a fuse at turn-on.

As Y8s pointed out however, electrolytic capacitors have two principle ratings, voltage and capacitance, which for a given physical dimension tend to vary inversely to one another. In other words, a cap rated for 10,000uf at 10 volts and a cap rated for 4,700uf at 20 volts will tend to be about the same size.

So, if your 22,000uf cap is rated at a sufficiently high voltage, then it will be "better" than a 10,000uf cap of the same voltage rating. The guys with the big subwoofers in their car routinely run caps of 1 farad (1,000,000uf) and bigger.

 

Yeah I noticed about the size thing, I opened two powersupplys and each had 2 big capiactiors, but they were around 3000 uf and rated at 200 volts hah. Those capiacitors for subwoofers are huge.

Joe what do you do for a living? You know a good amount about electronics, thanks for all the help.