I've only played it in the house, so haven't cranked it up.
I found it really confusing at first, but figured out you have to turn down the FX volume to zero.
I found 2 sounds which really work for me ("Red 96" = SWR Red Head & "Blue 70 Plus" = SVT-VR Plus) and I split the signal at my pedalboard, so a clean goes to one channel and the effects to the other.
I've still got to do a bit more to get to grips with it, though.
I might try my Ric in stereo to it at some point.