JBL BassPro 12 - 12 inch powered subwoofer enclosure - Amplified sub boxes - Online Car Audio & Stereo Store
JBL Sub Boxes (Loaded) at Crutchfield
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
0.95 ft³ @ 32Hz Ported Enclosure Box for JL Audio 12" TW3 (12TW3) Car Subwoofer – LifeAfterBass
Amazon.com: JBL Single 12" Car Audio Subwoofer Sealed Enclosure, Black : Electronics
Custom Ported Subwoofer Box Sub Enclosure for 1 12" JBL W12GTi MkII Sub ~ 32Hz | eBay