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 - Walmart.com
THX products finder –THX Certified, THX AAA, THX Spatial Audio
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
Subwoofer M 11000 SW THX Ultra 2 | Teufel
Amazon.com: Monolith Powered Subwoofer - 15 Inch with 1,000 Watt Amplifier, THX Certified, Ideal for Professional Studio and Home Theater : Electronics
Monolith by Monoprice 13" THX Ultra-Certified Subwoofer Overview | AV Gadgets