honestly i dont think u have the knowledge to own a 4500 rms amp. sorry to bash but unless u ONLY plan on doing 2 second burps, your just going to ruin your amp, batteries, and sub from voltage drop and clipping the signal. if u have the money for a 4500d and one or two subs that can handle that amp and expensive ass batteries, im sure u can spare another 500 bucks for a nice alternator. its really an all or nothing thing. u just cant have a daily system with that big of an amp without a 200+ amp alternator.