What Have I done? Shorted an amp?

ALWAYS turns off and unplug your gear before you make any changes of any kind. This will avoid any potential damage to your amp, preamp, speakers, etc..
There are potentially lethal voltages present in much of your gear, I would recommend unplugging and waiting an hour before attempting to change anything in your set-up. Jeff

Have you contacted Roland Research?

Thanks for all the insight and info. I did try Jeff Rowland Friday AM as SOON as I woke up and they were closed, they take Fridays off, nice.

After talking to a couple of electricians, trying to find a matching fuse, they gave me 2 8 amp, 250v, fast something fuses. I popped these in, and it works, no problems.

Yeah, I won't be doing the swapperoo with anything on again.............

Thanks,
Dan

I did something very similar once. I turned my system off when I moved my speakers but I didnt recheck the tightness of the connection after I moved them. I had only moved them a foot but thanks to the weight of the ridiclous mit network boxes it slipped off and touched the other connection. With a loud electrical crack and a cloud of smoke I burnt out a 135 lb amplifier.

The company didnt charge me a penny to fix it but it sure sucked packing that thing up and shipping it.