This is a used product that has been professionally rebuilt here at Sundown Audio. It comes with a non-doa warranty only. That means they are guaranteed to work when you receive it but no further warranty afterwards. Let us know within 24 hours of delivery if this product has an issue. We will not warranty any used subwoofer after that time. These potentially have scratches & scuffs on the magnets/motors and will not be in new condition. RMS 300 watts Dual 2 or 4 ohm voice coils Optimized for ported enclosures Class-leading 14mm Xmax Double-stacked magnet Vented magnetic gap & pole piece for superior cooling High strength stamped steel frame High temp 4-layer copper voice coil wire High-quality push terminals Stitched-on Mini-XL tinsel leads Through relentless research in our North Carolina Headquarters, Sundown optimized a 2” voice coil and a truly unique motor design to get the deepest possible bass response out of an 8” subwoofer. The E-series showcases a distinctive motor design, featuring a heavily vented magnetic gap and solid pole piece, enabling exceptional thermal power handling. The spider itself is a high strength poly-cotton blend designed to handle the full capacity of the motor. To provide an additional level of ruggedness the spider is bolted down and glued to the frame. Its motor geometry allows for a remarkable 14mm one-way linear Xmax, delivering excursion equivalent to far larger cones. Specifications RE (Ohms) 3.8 5.8 FS (Hz) 41.457 42.162 VAS (L) 7.573 6.738 Qes 0.476 0.576 Qms 3.854 3.198 Qts 0.423 0.488 BL (NA) 15.644 17.992 Mms (Grams) 111.718 121.404 Cms (mm/N) 131.923 117.374 Sens (dB @ 1w/1m) 82.4 81.3 Xmax 14mm 14mm T/S SPECS E V.6 8" D2 E V.6 8" D4   Enclosure Specs Ported Enclosure Size: 0.65 cuft net Port Area: 9 sq in Port Tuning: 35hz Sealed Enclosure Not Recommended Displacement: 0.07 cuft.  Depth:  4.98" Outside Diameter: 8.5" Cutout: 7.250" Physical Dimensions