Small bluetooth speaker box, home subwoofer, wireless wooden speaker vibration membrane, suitable for bathroom, office, home : Amazon.co.uk: Electronics & Photo
4 Inch Subwoofer Speaker Unit HiFi 4 8 Ohm Fiberglass Woven Basin Low Frequency Bass Loudspeaker Magnetic Speakers for Home (Color : Square 4 ohm Speaker) : Amazon.co.uk: Electronics & Photo
Active Subwoofer Speaker, 8" for Home Theatre Surround Sound, SHFS08 White | eBay
4 Inch Pure Bass Speaker 4Ohm 8Ohm 80W Audio Subwoofer Speakers Glass Fiber Woofer Loudspeaker for Home Theater DIY 1PC (Size : 8Ohm-1piece) : Amazon.co.uk: Electronics & Photo
Sony Centre UK - SA-SW3 200W Additional Wireless Subwoofer