Amazon.com: Alpine R-W12D4 Car Audio Type R Series Sub Dual 4 Ohm 2250W Peak 12" Subwoofer and HA-SWKD Dual Subwoofer Sub Box Install Kit : Electronics
Alpine R-W12D4 R-Series 12 inch Subwoofer with Dual 4 ohm Voice Coils 750W RMS
Alpine R-W10D4 manual (English - 9 pages)
Alpine R-W12D4 (Subwoofer auto) - Preturi
Difuzor subwoofer auto R-W12D4 Alpine Type R, 12" (30cm), 2 bobine de 4 ohm + 4 ohm, 2250W, 750W RMS