JBL BassPro 12 | 12" (300mm) Car Audio Powered Subwoofer System with Slipstream Port Technology
JBL SUB BassPRO12 450 Watts Amplified 12" Ported Subwoofer Sub Box Built In Amp 50036368308 | eBay
I Thought It Would be Better? JBL BASSPRO 12 Powered Car Audio Subwoofer - YouTube
Review: JBL GT Bass Pro 12" Subwoofer - Team-BHP
JBL BASSPRO12 12" Loaded Powered Subwoofer w/ JBL CLUB 9632AM 6x9" 3-Way Speakers and CLUB 622AM 6.5" Coax - Walmart.com
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