i just recently bought a kenwood 1000w amp and a 1200w 10″ kicker. the amp was pulling way too much power of my electrical system and draining my battery to where if my car sat all night it would be dead in the morning. there was a lot of negative comments (on other web sights as well as amazon) about how capacitors are a waste of money and they don’t help with not draining your battery. that is all bull $#!*, i have had the cap hooked up for about a week and no problems what so ever whit my battery or alternator.i was very pleased with the product and it doesn’t seem to be made cheaply. no complaints, does what its suppose to, and looks great. i would recommend this to any and everyone! i’ll put it this was Bestbuy is selling a 1 farad capacitor for $99.99, you tell me the better buy!