JBL S2-1224SS 12" SSI 12" SSI Subwoofer Enclosure with Slipstream Port S21224SS | eBay
GT5-12 | Quality 12 inch Single Voice Coil (SVC) Subwoofer
JBL BassPro 12 ported powered 12" bass package - Car Audio, Car Alarms and Stereo Installation San Jose Bay Area CA
JBL BassPro 12 Ported powered subwoofer with 12" sub and 150-watt amp at Crutchfield
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