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
JBL BassPro 12 Ported powered subwoofer with 12" sub and 150-watt amp at Crutchfield
CS1214 | 30 cm (12 inch) subwoofer, with double magnet suitable for enclosed, bass reflex and bandpass boxes
Best Buy: JBL BassProGo 4.5" Hybrid Subwoofer Black JBLSUBBPGOAM