My buddys setup 2 12" Rockford Fosgate P2's in a custom built ported to 37hz box. Alpine 700watt amp, Memphis 8gauge amp kit, Pioneer HU and highs. In a 4dr Grand Am with the back seats folded down or 2 12" Fusion PowerPlants in a custom built ported to 38hz box. Audiobahn A8002T amp. SPL 4gauge amp kit, Pioneer HU and highs! In a Extcab S10. Who will thump harder and be louder?