box: 2.35 after displace 32 hz amp: directed 1500d 1200 rms@1ohm sub: in the title previous system: 2 ported ib3 12s on 800 rms total My first overall impression of this sub was GOD DA MN. This thing does not MISS A NOTE. Every note hits equally loud and just sounds tremendous.. quite a bit better than the ib3's. Now I know what people mean by "flatness" and all that. It hits the lows great.... better than I would expect any single 12 could and again, sounds great doin it! Never loses its great sq, really surprises me, never new a sub could put out such clean bass, now Im never going back to any type of less than top quality sounding sub. As for as loudness its VERY close to the TWO ib3s, REALLY impressed me. To sum this up im just in love with this baby after listening for just 10 minutes. just amazes me what 1 12 can do. Next setup... 1 XCON 12 hahaha