Amazon.com: Goldwood Sound GW-8PC-8 Heavy Duty 8ohm 8" Woofer 330 Watts Replacement Speaker, Black : Musical Instruments
COPPIA WOOFER 16,5 CM 4 o 8 Ohm ALTOPARLANTI 165 MM - SOSPENSIONE MORBIDA - 2 X 150W MAX - x casse acustiche o sportello auto (4 Ohm) : Amazon.it: Elettronica
Amazon.com: Ground Zero Iridium 16,5 cm / 6.5" Subwoofer - 4 Ohm - 100 WRMS : Electronics
Amazon.com: Visaton W170-8 Woofer de 6.5 in 8 Ohm : Electrónica