Monolith Thx Certified 8in 150w Powered Subwoofer, Deep And Powerful Bass, Compact Design, Quick And Easy To Setup, For Home Theater Or Gaming Systems : Target
M&K Sound unveils new X+ Series line of THX Certified® reference subwoofers - M&K Sound® | Official Site
X15+ Subwoofer New product - M&K Sound® | Official Site
Logitech Z623 2.1 Speaker System with THX Certified Audio
M&K Sound unveils new line of THX Certified® reference subwoofers
Monoprice 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 - Newegg.com
THX-1200-SW Subwoofer | Klipsch
Klipsch THX-1200-SW Black Subwoofer
KEF Ci200QSb-THX Extreme In-Wall or In-Ceiling Subwoofer THX Ultra2 - Select2 - White - Pair | Audio Advice