Mixed voltage systems

So I was all excited I picked up a Cliff Designs Cap10 for like $110  I was thinking 10 Farads of capacitance would solve most of my problems.  I was wrong.  In reading the install instructions It turns out this is a 24Volt  capacitor.  Is there any way this could be incorerated into a 12 volt system,  I already have a second battery for the sterao so I could easily change the circut from parralel to series to generate the 24 Volts but I don't want to fry my 12 V Amps.   

Any advice youd be greatly appreciated since I cannot seem to find anything I understand online.

Thanks Steve

Well

It's a 200 Grand Am with the I4, I have upped the alternator to the 160 Amp from the late 90 Grand Prix (with some modding) I have a pair of Optima Red Tops. I am running a Sony mp70 deck and subbing a pair of MTX 1695 Mono Ds to a pair of AudioBahn AL10s  I also have a 1000W American Bass 15 that I am running from a JL 10001 I have two Stinger 1 F Caps but its just not enough

I Have  already rewired my headlights to a direct  ling relayed with 14 Gauge wire and they still dim. 

So I figured since the Cap bank Especially at the price I paid would be a great addition.

and then I can work on the trunk presentation.  Cause now its a rats nest of wire and sawdust.  Its Kinda neat how much 3/4 in MDF whistles when there is an air leak.

Anyways, Thanks for the advice and reassurances I am not going to blow up anything but my hearing.

Cheers Steve