DS18 EXL-XX15.2DHE High Excursion 15" Subwoofer 4000 Watts Max 2-Ohms DVC audio subwoofers
Amazon.com: BESTISAN Powered Subwoofer, 6.5" Active Home Audio Subwoofer in Compact Design,LFE & Stereo Line Inputs & Audio Output, Built-in Amplifier for Home Theater/Receiver/TV/Speakers, Black, SW65D : Everything Else
BOA181 - 18 inch Subwoofer 6,000 Watts RMS Dual 1 Ohm Mega Subwoofer
TXX-BDC4-18 Subwoofer Quad Stack
Epique E150HE-44 5-1/2" DVC MMAG Extended Range Subwoofer 4 Ohm per Coil