It seems sometimes that when I slow down the bass hits harder than when I'm moving. I know its not as loud when I'm moving, but I will slow down and a few seconds later the bass hits harder. I was woundering if it was my alternator needed upgrading, or buy a pretty good capacitor. if it is a capacitor i need, should i get 1 good one, or 2 lesser ones. ex:two 1farads or 1 2farad Hifonics BX1605D Streetwire 4 gauge 2 Audiobahn AW121T 1989 Volvo 740 GLE