JBL BassPro 12 Ported powered subwoofer with 12" sub and 150-watt amp at Crutchfield
MS-10SD4 SLIM | An advanced-design, shallow-mount, 4-ohm dual voice-coil subwoofer delivering phenomenal bass in a small space
Free Shipping 3Sets JBL BASSPRO SL 200 Watt Ultra-Compact Car Under Seat Powered 8'' SLIMLNE Subwoofer U.S.A Of HARMAN - AliExpress
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