B & C 21SW152-8 21-Inch 8 Ohm Neodymium Subwoofer
4000 W continuous program power capacity153 mm (6 in) split winding copper voice coil30 - 1000 Hz response96 dB sensitivity60 mm peak-to-peak excursion before damage. Neodymium magnet allows a very high force factor and linear excursion Double silicone spider with optimized compliance Ventilated voice coil gap for reduced power. compression Aluminum demodulating ring for very low distortion
B&C 21SW152-4 21 Neodymium Subwoofer 8 Ohm"