Alpine Type-R SWR-1522D 2000W Peak 15" Type-R Series Dual 2 ohm High Performance Subwoofer
Alpine Type-S SWS-15D2 15" 1500 Watt Dual 2-Ohm Car Audio Subwoofer Sub SWS15D2 | Audio Savings
LAB SlapBox™ 3.50 ft^3 Ported MDF Enclosure Box for Single Alpine 15" Type-
Best Buy: Alpine Type-S 15" Dual-Voice-Coil 8-Ohm Subwoofer Black SWS-15D4
Amazon.com: Alpine Type S Bundle Compatible with 2005-15 Toyota Tacoma Double Cab Truck S-W10D2 Dual 10" Loaded Sub Box Enclosure with S-A60M Amplifier and 4GA Amp Wiring Kit : Electronics