First, there is an audio section you can post this at. Ontop of that the best for the price are the package deals you buy at best buy or someplace like that. In a tib a single 10' sounds good from what I hear. I have duel 10' Alpine R10's and a 1500w rock/fos amp, and I vibrates the cars next to me. Wanna change it out for a single 15' Kicker Solo B..