Monoprice Monolith THX 13" Audiophile Grade Subwoofer for the Extreme Bassaholic - YouTube
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
THX - How the Outlaw Ultra X-13 subwoofer brings big sound to bigger spaces
Logitech Z625 2.1 Gaming Speaker System - THX Certified
Klipsch KW-120-THX THX® certified passive subwoofer with matching amplifier at Crutchfield
Klipsch KW-120 THX dual subwoofers and KA-... For Sale | Audiogon
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
Ci200QSb-THX | KEF USA
KEF Ci200QSb-THX Subwoofer PAIR – House Of Stereo
Jamo® THX Series 15" Stone Grey Subwoofer | Sound Concepts | AR
THX-1200-SW Subwoofer | Klipsch
Cinema Ultra SUB 300-THX, 1 Stück | MAGNAT Website