Help, because I aint compitant Options

[1_Winged_Angel]

ok, here is the deal, I don't know anything about car audio, by anything, I mean anything. For me, just pressing play and stop is basically the extent of my knowlege. BUT... I figure I need to get a new system just to get by at shows. I decided on decking my car out momo style so I am going to get the new polk/momo speakers and the 12" sub.

My question is, what else do I need to get for this system to work well, keeping the same quality that was intended for the speakers. What level should I run everything at? any suggestions or anything at all will greatly help, even if it is just to tell me how stupid I really am.

Thanks,
¤Chrí§¤

Oh yeah, it also has a crossover, I don't even know what that is.

[1_Winged_Angel]

pretty much everything myself