Energy ESW-8 Powered Subwoofer

Yamaha YST-SW011 8” Down-Firing Active Powered Subwoofer Fully Tested *CLEAN

Infinity BU-80 Powered Subwoofer - Tested

Onkyo Powered Subwoofer - tested

Monoprice Powered Subwoofer 8” Active Home Theater Sub Black Tested Works

Energy ESW-C8 Powered Subwoofer 8'' Active Sub TESTED Speaker Wood Box

Infinity BU-1 Active Powered Down Firing Subwoofer 8" Woofer Tested

Energy ESW-8 Powered Subwoofer and three included speakers