Monoprice Monolith 15" THX Certified Ported Subwoofer - First Impressions & Review | AVS Forum
Amazon.com: Monolith 16in THX Certified Ultra 2000 Watt Powered Subwoofer (Matte Black/Painted) Low Distortion, for Studio and Home Theater Systems : Electronics
Monolith M-15 V2 15in THX Certified Ultra 1000-Watt Subwoofer with Built in Amplifier | Reverb
Monoprice Monolith 10, 12 and 15-inch Subwoofer Review | Audio Science Review (ASR) Forum
Amazon.com: Monolith Powered Subwoofer - 15 Inch with 1,000 Watt Amplifier, THX Certified, Ideal for Professional Studio and Home Theater : Electronics