Ya, i do this for a living lol. and for some reason this one stumps me. i can't find the recomended Dims. for this thing for a sealed encloser. i use car subwoofers for DJ systems and found they wor VERY nicly when hooked to the right type of amp. (for example, Pyramid PA1800X 1800watt to 8ohm and 3600watt to 4ohm amp.) i need to pre build the boxes before i get the subs and i need the about CubicFT space needed. cause if i caant find it, im going to assume its nier 2.1cuFT like a few that iv built. these are to replace a 12" 2000watt 4ohm ADF-292 sub.