Street Reference Bass systems are the perfect way to add thundering bass to your ride without breaking the bank. Features: Slot port vented enclosure Woven tinsel leads 2" diameter 4-layer copper wound aluminum heat treated voice coil Recommended amp kit 8GKIT Specifications: Subwoofer Size (in) dual 12" Subwoofer RMS Power (w) 500 Subwoofer Peak Power (w) 1000 Sensitivity (dB) 85 Magnet Size (Oz) 39 Voice Coil Diameter (in) 2 Dimensions (in) 16.75 x 15 x 15.75