2x Infinity 10" High-Performance 1800W Peak Power Car Audio Subwoofers (Bulk Packaging) Bundle Combo with JBL Compact Class D Car Audio Mono Subwoofer Amplifier, Complete Amp Wiring Kit - Road Entertainment
Infinity Kappa 122.7w 12" subwoofer with selectable 1- or 4-ohm impedance at Crutchfield
Amazon.com: Infinity REF1200S Reference 12 Inch Low Profile Subwoofer with SSI (Selectable Smart Impedance) : Electronics
Infinity Kappa 1000W 10" Car Audio Subwoofer 1800 Watt MAX Selectable Impedance 50667371326 | eBay
Infinity 102.7w Kappa 10" subwoofer with selectable 1- or 4-ohm impedance at Crutchfield
Best Buy: Infinity Kappa 12" Single-Voice-Coil 4-Ohm Subwoofer Silver 120.9w
Infinity Kappa 123WDSSI Kappa Series 12" subwoofer with selectable 2- or 4-ohm impedance at Crutchfield