JBL Stage 1200D Stage Series ported enclosure with two 12" subwoofers at Crutchfield
Amazon.com: JBL Club WS1200 12" Shallow Mount subwoofer w/SSI (Selectable Smart Impedance) Switch from 2 to 4 ohm Bundled with Alphasonik Earbuds : Electronics
JBL CS1214 1000-watt, 12" Car Audio Subwoofer, Black - Walmart.com