Amazon.com: BESTISAN 60Watts Powered Subwoofer, Bestisan Home Audio Subwoofers, Sub Woofer for Bookshelf Speakers/Sound Bar/Receiver, Subwoofer with Deep Bass(LFE/Stereo Line Input/Audio Output), : Electronics
Amazon.com: Polk Audio PSW10 10" Powered Subwoofer - Power Port Technology, Up to 100 Watts, Big Bass in Compact Design, Easy Setup with Home Theater Systems Black : Clothing, Shoes & Jewelry
Amazon.com: BIC America F12 12-Inch 475-Watt Front Firing Powered Subwoofer : Electronics
Sony SACS9 10-Inch Active Subwoofer,Black : Everything Else
Amazon.com: Powered Subwoofer, Bestisan 6.5" Active Home Audio Subwoofer with Bluetooth in Compact Design, Opt/RCA/Bluetooth Input, Built-in Amplifier for Home Theater, Receiver, Speakers, Deep Bass in Black : Everything Else