JBL Stage 1200D Dual 12" 2-ohm Subwoofer Enclosure - Simpson Advanced Chiropractic & Medical Center
Amazon.com: JBL Club WS1000 - 10” shallow mount subwoofer w/SSI™ (Selectable Smart Impedance) switch from 2 to 4 ohm, Black : Electronics
JBL Club A600 High Performance Compact Class D Car Audio Mono Subwoofer Amplifier Bundle Combo with 1 Pair (QTY 2) of JBL Stage 1210 12" 1000 Watts Peak Power Car Audio Subwoofers - Road Entertainment