Amp keeps blowing fuses


Bronze Member
Username: Doug_w

Post Number: 88
Registered: Mar-05
I have a JBL 600.1 hooked up to 2 12" IDQ's they were running fine until recently my amp blew the 2 30 amp fuses it takes. Now everytime I replace the fuses they blow as soon as I turn the car on again. What are some possible solutions to this problem?

Gold Member
Username: Illuminator


Post Number: 3554
Registered: Apr-05
Do you have a DMM? Check the output devices, which sit on the heat sink, for shorts, and check the power supply rectifiers for shorts.

Beyond that a shorted filter cap is a remote possibility, and a shorted power transformer even less likely than that.

If you need help with checking the mosfets, this might be helpful:
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