12" ALPINE TYPE R 12D4 1000 watt RMS [Nissan Skyline R33] - YouTube
Alpine Type S SWS-12D4 12 Inch 1500 Watt Max 4 Ohm Round Car Audio Subwoofer
Alpine R2-W8D4 8-inch R-Series Subwoofer with Dual 4-Ohm Voice Coils
Alpine SWR-8D4 Type-R 1000W 8″ Subwoofer – Druery Car Stereo
SWR-12D2 3000W 12" dual 2Ω voice coil subwoofer
Amazon.com: Alpine SWT-10S2 10" 1000W Peak/350W RMS Shallow Slim Truck Car Subwoofer Bundle with Rockville ROCK EVERYWHERE Portable Bluetooth Speaker/Waterproof/Wireless Link : Electronics
Alpine R2-W8D2 | Sub 8" 20cm R Series Subwoofer | Dual 2 Ohm Voice Coils
Alpine SWR-1242D Type-R 12" subwoofer with dual 4-ohm voice coils at Crutchfield