I just bought myself a new car stereo it is actually my first one..it's a jvc and i just bought a couple of 3.5" speakers with it and haven't bought the amp or subs for it yet. I have a friend willing to sell me both...and want to know if they are any good the amp is a Pyramid PB881X 4 channel 1200watt amp and the subs are JL Audio 12W3v2 the amp he is selling to me for $270 and the subs $100 each...what am i getting myself into?