RMS 2000 watts Dual 1 or 2 ohm voice coil Made for extremely deep bass Triple-stacked magnet 3” voice coil Hyper-extended pole Built to order Designed with an extended pole piece and an incredible four inches of peak-to-peak excursion, the X v.3 is engineered for ultra-deep bass and high power handling. Engineered to set a new standard in the low-frequency/small-ported-box subwoofer category, the X Series can also work in up to a 50% larger enclosure if you desire even more low-end extension.  The X v.3 series differentiates itself with its incredibly linear suspension, ensuring the lowest level of bass extension in a small enclosure while maintaining extremely low levels of distortion. Notably, the v.3 series features a much larger motor structure (220mm vs. 190mm on the V.1 series), improved motor ventilation, and an all-new Mega-Roll v.2 surround, providing a more linear and rugged update to the world-famous Mega-Roll v.1 surround design. Specifications T/S SPECS X V.3 15″ D1 X V.3 15″ D2 RE (Ohms) 1.4 3.2 FS (Hz) 31.418 31.423 VAS (L) 45.907 45.924 Qes 0.486 0.561 Qms 2.562 2.801 Qts 0.409 0.468 Le (mH)     BL (NA) 15.518 21.831 Mms (Grams) 423.721 423.436 Cms (uM/N) 60.563 60.585 Sens (dB @ 1w/1m) 86.5dB 85.9dB Enclosure Specifications X v.3 15 Sealed Enclosure N/A Ported Enclosure 4.25 cu ft Recommended Tuning 32hz Recommended Port Area 68 sq in Displacement 0.22 cu ft Depth 11.6" Outside Diam. 15.51" Cutout 13.83" Physical Dimensions Download Enclosure Designs .Zip File