Hi, I'm about to buy my first stereo. I just ordered the ddm3b and a rf t400. Going on one aq hdc318, soon to be fi sp4 or a dd sub:) for power i got all 0gauge. Im thinking one d3400 in the front and a d3100 in the back at the start, I have a 120amp alt, will it work for a little while? Ive talked to singer, they have a 220amp for about 500$. Is there much of a difference from 120 to 220? The car is a 99 passat, thanks:)