Buy the Klipsch THX Promedia 2.1 Subwoofer And Speakers | GoodwillFinds
Amazon.com: Monolith THX Certified 8in 150-watt Powered Subwoofer, Deep and Powerful Bass, Compact Design, Quick and Easy to Setup, for Home Theater or Gaming Systems : Electronics
X15+ Subwoofer New product - M&K Sound® | Official Site
THX - How the Outlaw Ultra X-13 subwoofer brings big sound to bigger spaces
Amazon.com: Monolith THX Certified Ultra 2000 Watt Powered Subwoofer - 16-Inch, Low Distortion, RCA and XLR Inputs, for Studio and Home Theater Systems, Matte Black : Electronics
KEF Ci3160RLb-THX EACH In-Wall Subwoofer | Accessories4less
Monoprice Monolith THX Subwoofers Shake the Foundation - ecoustics.com
KEF Ci200QSb-THX Subwoofer PAIR – House Of Stereo
Sonance The Sub 12" THX subwoofer THE SUB (A) | eBay