Add another battery... there is an electronic switch that charges both battery's i cant recall the name of the dang thing.. but any good car stereo store will be able to get one. beside Caps only help on large bass surges they hold enough power for maybe 1/2 -1 second before they need to be refreshed. a second battery and reving your engine higher to get more power out of the alternator will help.. but then again there is always a limit to your electrical system. I installed car stereo's professionaly for years.. More caps might help a little 400watts per farad i say. hope this helps
