Amazon.com: Alpine R-W10D4, R Series Dual 4 Ohm Voice Coil 2250 Watts Subwoofer, 10" : Electronics
Kit a 2 vie compatibile con ALPINE SPG-17CS 6,5" 16,50 cm 165 mm diametro 70 watt rms 280 watt max 2 woofer 2 tweeter 2 crossover 4 ohm, a coppia : Amazon.it: Altro
Amazon.com: ALPINE SWT-S10 1200w 10" Car Subwoofer in Bass Tube Enclosure+Amplifier+Amp Kit : Electronics
1 kit sistema a 2 vie compatibile con ALPINE SXE-13CS 5,25" 13,00 cm 130 mm diametro 40 watt rms 250 watt max 2 woofer 2 tweeter auto 4 ohm, a coppia : Amazon.it: Elettronica