Amazon.com: Alpine Type R Bundle Compatible with Universal Car R-W10D4 Single 10" Loaded Vented Port Sub Box Enclosure with S-A60M Amplifier and 4GA Amp Wiring Kit : Electronics
Alpine S-W10D4 S-Series 10" subwoofer with dual 4-ohm voice coils at Crutchfield
Universal Fit Alpine S-W12D2 Type S Triple 12" Subwoofer Loaded Sub Box New | eBay
Alpine 12 Inch Bass Line Subwoofer (W12S4) | SK Customs Car Audio & Home Theater | Atlanta | Norcross | Duluth | John's Creek