Alpine SWA-12S4 BassLine Series 12" 4-ohm subwoofer at Crutchfield
Alpine KTA-200M SWT-12S4 Alpine KTA-200M Mono Power Pack Amp with Alpine SWT-12S4 12" Loaded Tube Subwoofer and Absolute TW500 Dome Tweeter and Electrical Tape and Mobile Bracket | Reverb