センターバレーJBL S2-1224 12” SSI(TM) Subwoofer and enclosure switch Smart Black to Impedance) (S2-1224SS) from ohm, with (Selectable スピーカー | grupouniversal.com
JBL 102SSI Stadion Subwoofer,| | - AliExpress
Amazon.com: JBL S2-1224 SSI Car Subwoofer : Electronics
JBL STADIUM1224 12” Subwoofer w/SSI™ (Selectable Smart Imp.) 2 & 4 ohm | Bramalea City Centre
JBL STADIUM122SSI, Stadium Series 12" 2 Ohm or 4 Ohm Car Subwoofer w/S – AVLeaderz