Amazon.com: Saiyin Bluetooth Bookshelf Speakers, Big Powered Speakers with 5 Inch Woofer, Active Bookshelf Speakers 40W X 2, Optical/RCA inputs/ Subwoofer Line Out for Turntable, TVs : Electronics
Amazon.com: BESTISAN Powered Subwoofer, 6.5" Active Home Audio Subwoofer in Compact Design,LFE & Stereo Line Inputs & Audio Output, Built-in Amplifier for Home Theater/Receiver/TV/Speakers, Black, SW65D : Everything Else
Amazon.com: GDAE10 in-Vehicle Powered Subwoofer & Loud Portable Bluetooth Speaker, Powerful Sound and Monstrous Bass, Waterproof, Multi-Speaker Pairing FM/USB/TF and USB Charging, Home and Outdoo Use : Electronics
Amazon.com: Acoustic Audio by Goldwood AAT3002 Tower 5.1 Home Theater Bluetooth Speaker System with 8" Powered Subwoofer : Electronics
JBL BassPro Go Water-Resistant Powered Subwoofer Portable Bluetooth Speaker | eBay
ELAC Varro DS1000-BG Dual Reference 10" powered subwoofer with Bluetooth® app control and Auto EQ at Crutchfield
Amazon.com: Bluetooth Computer Speaker USB Powered Subwoofer Wireless/Wired 2.0 Stereo 360 HD Bass Soundbar for Desktop Tabletop Computer Phone Compatible with Windows 7/8/10 Mac iPhone Android Samsung(Black) : Electronics