B&amp;C 21SW115-8 21-Inch 3400 Watts Neo Woofer<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>3400 W continuous program power capacity116 mm (4.5 in) split winding copper voice coil33 - 1000 Hz response97 dB sensitivity</li><li>60 mm peak-to-peak excursion before damage Neodymium magnet allows a very high force factor and linear excursion</li><li>Double silicone spider with optimized compliance Ventilated voice coil gap for reduced power compression Aluminum demodulating ring for very low distortion</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41EuzFIYrkL.jpg" noproxy>