I am kind of a little lost , I had a zapco 1000.1 amp with 2 boston g3 12s and wow it sounds really good. I sold that car and now am doing a install on a 95 chevy caprice same car as a impala ss . It has a pretty nice rear facing box set up for 2 15s and is sealed with just over 2 cubic feet each speaker. My buddy who I trust told me to run rockford P2 15s and my zapco 1000.1 to them . I listen to a lot of techno and rap and some rock. I like low bass . I had kicker comp and cvr 15s but the bass notes seem all the same . I know 15s are big for that but I do like the sound. Is there even such a thing as a sound quality 15 ? If boston made a G3 15 I would just buy those. The choice of amps I have are 4 zapco 500m , 1 zapco 1000.1 , zapco 1400 and 2 ppi sedona 500ix and a old school earthquake pa2300 , I can use what ever combo for the bass, I really want to run the zapcos I like them the best. I am not sure what has more power the reference zapco 1400 (4 ohm stable ) or the reference 1000.1 (2 ohm stable) But wow that earthquake amp has some power! Or I can do one ppi in 4 ohm to each 15 . Wow sorry I am just rambling !