Amazon.com: B&C Speakers 18DS115-4 18-in Woofer with 3400 Watts Continuous Program Power Capacity 116mm (4.5 in) Four Layer Aluminum Voice Coil 4 Ohms Impedance, Black : Electronics
B&C 18 SW 115 & Sklatscht 115 - YouTube
B&C Speakers SpA - New Release: The 18DS115 subwoofer with a new, longer, four-layer aluminum voice coil. Increased Xvar and very high motor strength at the same weight and cost. Higher sensitivity,