Hi drew, sorry to hear that. I am currently running a 3, but I did try a 1.6 after it had played the first night, it blew immediately. I have purchased some 2 amp fast and slow blow but I haven't tried them yet.
All of my measurements were well within tolerance with the exception of the test with 1% tolerance which was 1 volt off. I had seen no issues with it, it is still breaking in but has moments of excellence. I just installed new caps so they will take a bit to break in as well.
If you try the larger fuses just be ready to kill power like Josh mentioned.
Good luck!
Ed
Edit: it took the 2 amp slow blow.