I have a short loan of this amp, and gave it a bit of a blast at home last night. It's being used at band practice tonight, so I'll get a chance to see how it sits in that setting...
Totally agree with Michael's description above though. I don't have a lot of experience with big old valves, and always wondered what all the fuss was about - but there is just so much 'authority' to the sound of this amp. Even at (relatively) low volume at home, the sound filled the room.
It has few features, but they all seem to do quite a lot! The "Feedback" switch in particular. Odd one that. It sounds immense on the "rock" setting, slightly emasculated on "pop" and seriously flabby and deflated on "funk"! I didn't have much time to really explore the possibilities, but for me I think I would just leave it on the "rock" setting.
The distortion is lovely, and very useable. For a couple of years I have been using a Behringer BDI21, and although I'm pretty happy with it, I realise that the sound I was trying to achieve exists in this amp! I somehow manages to sound clean and dirty at the same time (no, I don't know what i mean by that either!), but it's largely down to that word "authority" again. Other might call it heft...
So first impressions are very good. The sound in my head can also be the sound in the room...
It's not heavy, but feels substantial and solid. My one slight concern is that (in it's current spec) the back of the amp is not covered by the case. Maybe I am a bit over-nervous about the valves because I'm not used to seeing them, or maybe because it's not mine and I am paranoid about damage - but I would prefer some rear coverage...
Looking forward to drowning out trying it with the rest of the band this evening!!