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 600 watts Dual 2 or 4 ohm voice coils Black Aluminum 2.5” voice coil for superior heat dissipation High-temperature 4-layer copper voice coil wire Stitched-on “Mini-XL” tinsel leads to prevent fatigue and failure Solid pole-piece and multi-vent magnetic gap Dual-magnet design for smooth acoustic response Custom tooled cone shape for reduced mechanical noise over high excursion Bolt-through motor design to ensure maximum longevity and ruggedness Sundown’s highest-power slim subwoofers, the SLD takes incredibly high volume by introducing numerous important upgrades: pole-piece channels for reduced air noise & increased cooling, top-plate “slits” for better cooling and less distortion, and a magnet shorting ring. Sundown also bolted down the spider, bolted the motor together, bolted on the aluminum pole cap, and added “mini-XL” lead wires for years of flawless service. Specifications T/S SPECS SLD 10″ D2 SLD 10″ D4 RE (Ohms) 3.65 6.85 FS (Hz) 44.907 46.817 VAS (L) 14.630 12.091 Qes 0.452 0.547 Qms 2.212 2.246 Qts 0.376 0.440 Le (mH)     BL (NA) 18.247 24.492 Mms (Grams) 146.252 162.818 Cms (uM/N) 85.883 70.979 Sens (dB @ 1w/1m) 86.5 85.4 Xmax 12mm 12mm Enclosure Specifications Sealed Enclosure 0.5 cu ft Ported Enclosure 1.0 cu ft Recommended Tuning 35Hz Recommended Port Area 15 sq in Displacement Depth 4.9" Outside Diameter 10.5″ Cut-Out 9.25″ Physical Dimensions Download