JBL PRX712 speaker blows the fuse

I have a JBL PRX712 speaker. It blows the 6.3 amp fuse. The two speakers are good. There are no obvious signs of damage, no bulging caps, no burnt areas. I have removed and tested a bridge rectifier and tested about half the capacitors. 

I am hoping that someone has experience with this particular speaker and can give me a few directions on what to try next.