airraptor you also just repeated what i said about helping in short burst and as a storage for support against voltage sag, i believe they do work and help alot im not fooled by magzines, i use to be in heavy into stereo systems until i realized i enjoyed my hearing. 200farad cap would be overkill on a 1000watt system. Typicall for every 500watts 1/2 farad is enough.i didnt mention anything about max output, thats not there purpose.hopefully that didnt come of aggressive wasnt the intent, just conversation. My point is you pull up to a stop light and the stereo is full blast, with the car at idle the battery and alternator will not handle the demands, in return your headlights will dim badly, add a sufficient cap, it will handle supply the neccessay voltage to support the system temp under load and the headlights won't dim. Voltage lag. This thread has gone wild. I don't feel I posted any wrong information and not sure how my words where read wrong and the power the sub or max output with the cap not sure how that happened but I think I am going to gratefully bow out of this topic for now. Good luck genetlemen.