i just thought of this idea today. Since caps "stiffen" the voltage for whatever is on the receiving end then would this help the electrical system such as the lights from dimming? i realize you would need a lot of farads in order for this to work well but it could be worth a try. Has anyone ever tried this? i dont think i will just because i dont have the money for a high farad cap. i also know that caps still need to be powered by the alternator which is also powering the amp. so let me know what you all think.