JBL SUB18 18" Powered Studio Subwoofer - Single - Vintage King
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JBL Stage 810 8" component subwoofer at Crutchfield
Amazon.com: JBL Club 1024 - 10” Subwoofer w/SSI (Selectable Smart Impedance) switch from 2 to 4 ohm, Black : Electronics
Amazon.com: JBL Club WS1000 10" Shallow Mount subwoofer w/SSI (Selectable Smart Impedance) Switch from 2 to 4 ohm Bundled with Alphasonik Earbuds : Electronics
JBL Stadium 102SSI Stadium Series 10" component subwoofer with switchable 2- or 4-ohm impedance at Crutchfield