B&C 18TBX100 18-Inch Subwoofer Car and DJ 2400 W continuous program power capacity 100 mm (4 in) copper voice coil 35 - 1000 Hz response 97 dB sensitivity Aluminium demodulating ring allows a very low distortion figure Double silicone spider with optimized compliance Ventilated voice coil gap for reduced power compression Ventilated voice coil gap for reduced power compression