Hot Selling RMS 1500W Car Audio Speaker 15 Inch & 12 Inch Auto Stereo Subwoofer 20Hz-150Hz Sound Trumpet - China 15inch Subwoofer, Car Subwoofer | Made-in-China.com
Studiophile BX10s Subwoofer 240W 20Hz to 50Hz-200Hz/ (No Cables) (sold as is) | eBay
CIARE 15.00 SW 1000watt 8ohm 20Hz SUB-WOOFER
Canton SUB 12.4 Hi-Fi subwoofer Black 380 W 20 Hz - 200 Hz | Conrad.com
Big High End Subwoofer 20 Hz | diyAudio
Subwoofer Box 20hz 10" | Ported Box | Slot
Crown 300W 12" Karaoke Woofer Speaker with Max 8 Ohms Impedance, 20Hz- – JG Superstore