JBL EON718S 18" Powered PA Subwoofer Black EON718S - Best Buy
Amazon.com: JBL Club 9630 480 Peak Power 6x9 3 ohm Club Series 3-Way UV-Resistant Polypropylene Woofers Coaxial Car Audio Stereo Speakers Grilles Included Bundled with Alphasonik Earbuds : Electronics
JBL Stadium 102SSI Stadium Series 10" component subwoofer with switchable 2- or 4-ohm impedance at Crutchfield
Amazon.com: JBL Club 1224 - 12” Subwoofer w/SSI™ (Selectable Smart Impedance) switch from 2 to 4 ohm, Black : Electronics