Amazon.com: JBL SUBBP12AM - 450 Watts (150W RMS) 12” Amplified 12 in. Ported Subwoofer with Sub Level Control and Distortion Free Bass with Gravity Magnet Phone Holder Bundle : Electronics
MS-12SD4 - JBL 12" 450W RMS Dual 4-Ohm MS Series Subwoofer
STADIUM SUBWOOFERS
JBL Stadium 1024 - 10” Subwoofer w/SSI™ (Selectable Smart Impedance) switch from 2 to 4 ohm
JBL JBLSUBSD102SSIAM 450W Stadium Series 10" High-Performance Car Subwoofer 50036381161 | eBay
JBL Stadium 102SSI
JBL Stadium 102SSI Stadium Series 10" component subwoofer with switchable 2- or 4-ohm impedance at Crutchfield