JBL ST1200D Dual 12" Slot Ported Subwoofer 1200 Watt Sub Box Final 2 Ohm Load 50036381567 | eBay
JBL GX Series 12" Single-Voice-Coil 4-Ohm Subwoofer Black GX1200 - Best Buy
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