Your #1 Source for Audio, Video and Speaker Building Components. B&C 15SW115-4 15 Professional Neodymium Subwoofer 4 Ohm. An aluminum demodulation ring fitted to the&#######xA0;15SW115-4. S pole piece reduces distortion. Lightweight but powerful FEA-optimized neodymium magnet. Extremely high BL factor and Xmax for outstanding LF output. 13.5 mm Xmax, 60 mm peak-to-peak excursion before damage. […]... Read More