JBL SRX828SP | 18" Dual Self-Powered Subwoofer System
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 8
BassPro SL2 | ["Add high-performance bass with a low-profile woofer enclosure", "Self-Powered, 8\" (200mm) low-profile under seat subwoofer system"]