JBL STADIUM122SSI 12” High Performance 1350 Watts Peak Power Selectable Impedance Car Audio Subwoofer Bundle Combo with Class D 1500 Watts Peak Power Car Audio Mono Amplifier and Amp Wiring Kit - Road Entertainment
JBL BASSPRO12 12" Loaded Powered Subwoofer w/ JBL CLUB 9632AM 6x9" 3-Way Speakers and CLUB 625AM Premium 6.5" Coax - Walmart.com
JBL 12 in. 250W Pro Audio Powered Mid Bass Subwoofer - Walmart.com
Amazon.com: JBL Club 1224 - 12” Subwoofer w/SSI™ (Selectable Smart Impedance) switch from 2 to 4 ohm, Black : Electronics