The Best High-Performance Subwoofer | Reviews by Wirecutter
Alpine Halo S-Series Single 10" Preloaded Subwoofer Enclosure with ProLink™ Black S-SB10V - Best Buy
Amazon.com: Planet Audio PAB80 Car Subwoofer and Amp Package – Built-in Amplifier, 8 Inch Subwoofer with Passive Radiator, Remote Subwoofer Control : Everything Else