Monoprice 8in 60-Watt Powered Subwoofer, Black | Reverb
Monoprice Premium 5.1.2 Channel Immersive Home Theater System with Subwoofer 33831 | Zoro
Checking It Twice: Retesting the Monoprice Subwoofer | Wirecutter
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