All, I've been researching the net and testing and fixing things on the PCB as I've found issues. All that said - When I plug the sub in attached to a speaker it blows the power fuse. I unplugged the speaker and tested the speaker wire with a meter and found 160V on the speaker leads. What part of PCB should be looking at? I've replaced caps at C18, C37-C40, C45-C46 and I took out some of the output transistors and tested them... Any thoughts?