BassPro SL2 | ["Add high-performance bass with a low-profile woofer enclosure", "Self-Powered, 8\" (200mm) low-profile under seat subwoofer system"]
JBL 4645 Professional Series 18" Subwoofer - Perfect for JBL 4343 Spea
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
New JBL BassPro 12 Ported Powered subwoofer with 12" sub and 150-watt amp - Walmart.com