To keep this thread alive, I have the XL, latest firmware, connect with 4cm to my blackstar ht-5 mkII and orange cab. Sound is finally awesome, this is the 5th amp I tried, including a Laney 112 frfr cab (which sounded very fake). Anyway, I have the whole rig powered with one power switch and when everything is on and ready I have no sound until I flick the volume knob of my stomp xl. Didn't have that problem with any of the other amps I tried out (1 koch, 2 marshalls, 1 laney).
Anybody experienced this too? I'm thinking that maybe the Blackstar is ready before the XL and it needs a volume refresh (or current change) before it accepts signal.
Who knows what's happening?