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Old 12-02-2012, 07:31 AM
727Designs 727Designs is offline
Car Audio N00b
 
Join Date: Mar 2012
Posts: 469
Default Re: Show Your System

I'll jump on my soapbox for a second here about capacitors...

Copied and pasted this from a capacitor discussion we had a while back on another board:

A capacitor dispenses it's energy the voltage usually drops. But if a car's electrical can handle the load and keep voltage up, let's say 14.4V, then even if it stayed at 14.4V and he had a 11F capacitor for a 5500W amp and if it pulls 500A even of current then he could run use it for approx. .32 or 1/3 seconds. IIRC a cap charge is Q = C * V. So assuming it's 500W RMS per 1F which is usually about right, one would need an 11F capacitor for 5500W of power. If voltage stays at 14.4V and doesn't drain, then Q = 11F * 14.4V. That would mean Q = 158.4 coulombs. 158.4coulombs divided by the the current draw of 500A would be the time it would take for the capacitor to disscharge, or .3168 seconds. This is all assuming voltage stays at 14.4V.

If you do the math it comes out to 33 farad PER SECOND to run 5500w, or roughly 8.25 farad per 1400w per second.
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-Zach/727Designs-
2012 USACi SPL Mod 0-1000 GA State Record Holder
1988 Honda CRX Si - IASCA Stock Hatchback/Wagon 2
2000 Ford Expedition - IASCA Adv3/Heavyweight 160dB+ -SOLD-
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