Zepmac

i have a dual 12 inch Visonik banpass subwoofer and a visonik v3909 amplifier it uses 3 40 amp fuse inside, i have blown about 9 fuses that connect from the battery to the amp, so far i have blwon everything from 60 amp fuses up to 150 amp fuses, not the ones inside the amp, im wonderin why this is happening because at first i was blowing them because the power needed in the amp wasnt being matched and i fugured 150 amp fuse would do the trick but no once again when i crank it up the shit shuts off, i think it may be beause i need a bigger alternator, if anyone can help me please write a reply or send me an email @ Zepmac@aol.com thanks peace