Kicker 10cvr12-4 2010 Comp Vr Series 12 Inch 4 Ohm Dual Voice Coil 800 Watt Car Subwoofer This product is part of the Kicker Pro-Fit product group which is the highest end products offered by Kicker Sensitivity: 86.9 dB Sealed Box Volume 1.0 - 4.6 cubic feet Stamped Steel Basket Extra strong adhesive and stitching prevents the cone from getting separated from the surrounds