Well, as the sub is designed, I installed it in a strictly SQ setup in my 96 Jimmy/Blazer. I am powering one 12" Fi Q sub with a Hifonics BXi 1206D amplifier at 1 ohm (dual 2 ohm sub). So it is receiving a nominal 1200w, but more realistically about 1080 watts. I put it in a 2.8 cube ported box (after displacements) with a 6" round port. Pete over at hexibase.com/forum (user = HexiBase), the same Pete on TTB, helped me design the box specifically for SQ in my specific vehicle. My head unit