Amazon.com: JBL Club WS1200 12" Shallow Mount subwoofer w/SSI (Selectable Smart Impedance) Switch from 2 to 4 ohm Bundled with Alphasonik Earbuds : Electronics
Sonos Bundle: Arc Premium Smart Soundbar, Sub Wireless Subwoofer (Gen 3), and Sonos One SL Speaker (Pair)
10" Powered Subwoofer Smart Active Subwoofer Speaker For Indoor Outdoor | eBay
Smart 453 JBL Sound System Subwoofer Speaker Genuine SMART A4538201200
Amazon.com: JBL Club WS1200 - 12” Shallow mount subwoofer w/SSI™ (Selectable Smart Impedance) switch from 2 to 4 ohm : Electronics