CSX Series 15D2 15" 2500w RMS Subwoofer by CAS (Open Box) - 1800woofers.com
Alpine Type-S SWS-15D2 15" 1500 Watt Dual 2-Ohm Car Audio Subwoofer Sub SWS15D2 - Walmart.com
Lacava 15D2.L.R-A-44 Trim Only - 2-Way Diverter Valve - Matte Black [15D2.L.R-A-44] - $190.00 : FOCAL POINT || Top Quality Hardware and Plumbing - Kitchen & Bath