Crown 400W 15" Active Subwoofer with Speaker Volume Control, Built-In – JG Superstore
Perlisten R212s Subwoofer
Yamaha HS8S Powered Subwoofer Black bundled with Subwoofer Isolation Pad and 2 x 20-Foot XLR Cables | Great Deals on Musical Instruments and Pro Audio – e2genesis
Episode Triple Series Passive Radiator Subwoofer ES-SUB-TRP10-500 with XLR k695 | eBay