Amazon.com: Monolith Powered Subwoofer - 15 Inch with 1,000 Watt Amplifier, THX Certified, Ideal for Professional Studio and Home Theater : Electronics
Monoprice Monolith M-212 Dual 12in THX Certified Ultra 1000 Watt Subwoofer - Bass Output, Low Distortion, For Home Theater System Audio / Video Accessories - Newegg.com
Amazon.com: Monolith M-10 V2 10in THX Certified Select 500 Watt Powered Subwoofer - Piano Black Finish | Massive Output, Low Distortion, for Studio and Home Theater Systems : Electronics
CEDIA 2019: Monoprice Demos Its New M-215 Monolith Subwoofer - YouTube
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
Amazon.com: Monolith M-215 THX Ultra Certified Powered Subwoofer - Dual 15in, 2000-Watt Amplifier, Massive Output, Low Distortion, for Home Theater Systems, Black (138543) : Electronics
Monolith by Monoprice M-215 DUAL 15 inch THX Subwoofer & Monoprice HTP-1 16 Channel Processor |CEDIA - YouTube