Sundown Audio 10″ E Series V.4 500 RMS D2 Subwoofer. Power = 500 Watts RMS. Dual 2 OHM Voice Coils. Model: E-10 V.4 2 OHM. High Temperature 4-layer Copper Voice Coil Wire. Xmax = 14mm One-way by 70% Bl.
eBay