JBL CLUB1224AM Club Series 12 Inch Subwoofer with SSi Selectable Impedance - 2 or 4 Ohm - Creative Audio
JBL CLUB WS1000 10” SHALLOW MOUNT SUBWOOFER w/ SSI 2 0R 4 OHM SELECTABLE -NEW- 50036331593 | eBay
JBL Club 1024AM, Club Series 10" 2 Ohm or 4 Ohm Car Subwoofer w/SSI – AVLeaderz
1 Pair (QTY 2) of JBL STADIUM122SSI 12” High Performance 1350 Watts Peak Power Car Audio Subwoofers with SSI (Selectable Smart Impedance) - Road Entertainment
JBL CLUB1224AM Club Series 12 Inch Subwoofer with SSi Selectable Impedance - 2 or 4 Ohm - Creative Audio
JBL STADIUM122SSI at Onlinecarstereo.com
Buyr.com | Subwoofers | JBL S2-1224SS Series II 1100 WATTS 12" Selectable 2 OR 4 OHM SUBWOOFER Enclosure
Amazon.com: JBL S2-1224 - 12” Subwoofer with enclosure and SSI™ (Selectable Smart Impedance) switch from 2 to 4 ohm, Black (S2-1224SS) : Electronics