Niles SW8 8" Compact Powered Home Theater Sub Dual Passive Radiators 1200 Watt

Dual 12" Powered Subwoofer for Home Theater #L12SW

Rockville Rock Shaker 12" Inch Black 800w Powered Home Theater Subwoofer

KEF Kube 8B - 8" (Kube8b) 300W Powered Subwoofer Black (Used, No Box)

Acoustic Audio PSW-12 Home Theater Powered 12" Subwoofer 500 Watts Surround

Martin Logan Dynamo (Original) Powered Subwoofer