Klipsch R-100SW 10" Subwoofer, Incredibly Deep Bass and an All-digital Amplifier,14 5" x 12 5" x 16 4"

Klipsch R-12SW Powerful Deep Bass Front Firing 12" Copper-Spun Driver 400W Digital Power Subwoofer 14" X 18.5" X 16"

Sub 4 - Wireless Subwoofer - Black

Klipsch R-120SW Subwoofer, Black

Sonos Sub Mini - Black - Compact Wireless Subwoofer

Dayton Audio BST-1 High Power Pro Tactile Bass Shaker 50 Watts RMS, 4 Ohms Impedance - Turn Any Surface into a Speaker System - Generates Subwoofer Lows

SVS SoundPath Subwoofer Isolation System, 4-Pack

Sony SA-SW5 Wireless Subwoofer for BRAVIA THEATER (BAR 9, BAR 8, QUAD), HT-A9/A7000/A5000/A3000/S2000 and STR-AN1000

Edifier T5 Powered Subwoofer - 70w RMS Active Woofer with 8 inch Driver and Low Pass Filter

Yamaha Audio 10" 100W Powered Subwoofer - Black (NS-SW100BL)