THX Certified 5.1 Home Theater Speaker System Unveiled by Monoprice
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
M&K Sound unveils new X+ Series line of THX Certified® reference subwoofers - M&K Sound® | Official Site
THX amplis enceintes THX Ultra Dominus 3D Display Select