Best Buy: JBL 450W 10" Single-Voice-Coil SSI Subwoofer Black / Orange S31024
JBL STADIUM122SSI 12" High Performance Automotive Audio Subwoofer with Selectable Impedance - Creative Audio
1 Pair (QTY 2) of JBL STADIUM122SSI 12” High Performance 1350 Watts Peak Power Car Audio Subwoofers with SSI (Selectable Smart Impedance) - Road Entertainment
S2-1224 | 12" car audio subwoofers
Amazon.com: JBL S2-1224 - 12” Subwoofer with enclosure and SSI™ (Selectable Smart Impedance) switch from 2 to 4 ohm, Black (S2-1224SS) : Electronics
Amazon.com: JBL S2-1224 SSI Car Subwoofer : Electronics
JBL Stadium 82SSI
JBL Stadium 102SSI
JBL CLUB1224AM Club Series 12 Inch Subwoofer with SSi Selectable Impedance - 2 or 4 Ohm - Creative Audio
S2-1224 | 12" car audio subwoofers
Amazon.com: JBL S2-1224 SSI Car Subwoofer : Electronics
JBL CLUB WS1200 12" 1000W SHALLOW-MOUNT LOW PROFILE SUBWOOFER BASS SPEAKER NEW 637740957303 | eBay
JBL Club 1024AM, Club Series 10" 2 Ohm or 4 Ohm Car Subwoofer w/SSI – AVLeaderz
JBL Club 1224 12" Subwoofer
Amazon.com: JBL Club 1024 - 10” Subwoofer w/SSI (Selectable Smart Impedance) switch from 2 to 4 ohm, Black : Electronics
JBL Club 1224AM, Club Series 12" 2 Ohm or 4 Ohm Car Subwoofer w/SSI – AVLeaderz
Amazon.com: JBL Club WS1000 - 10” shallow mount subwoofer w/SSI™ (Selectable Smart Impedance) switch from 2 to 4 ohm, Black : Electronics
Best Buy: JBL 450W 10" Single-Voice-Coil SSI Subwoofer Black / Orange S31024
S3-1224 | 12" (300mm) high-performance car audio subwoofer
JBL CLUB WS1000 10” SHALLOW MOUNT SUBWOOFER w/ SSI 2 0R 4 OHM SELECTABLE -NEW- 50036331593 | eBay