GTO1214 | Powerful 12 inch 4-ohm Voice Coil Subwoofer
JBL STADIUM Compatible with Ford 01-12 Escape Bundle 2-Pairs STADIUMGTO860 6x8" - Walmart.com
JBL GTO1214D Grand Touring Series 12" subwoofer with dual 4-ohm voice coils at Crutchfield
1 Pair (QTY 2) of JBL STADIUM122SSI 12” High Performance 1350 Watts Peak Power Car Audio Subwoofers with SSI (Selectable Smart Impedance) - Road Entertainment
Amazon.com: JBL - Two STADIUM122SSI 12" High Performance Automotive Audio Subwoofers with Selectable Impedance : Electronics