Not specifically the AVT, but I’ve heard plenty of people bad-mouth ValveStates in general. I do have a lot of corksniffers for company. I must say, though, two things in their defence.
1) The LG in my ’90s band used an 8040 for rehearsal and small bars and it sounded fine to me. Not Grrrreat, but decent and even the recordings are sound. True, he moved onto a 50W something like a JCM800 (I’m not up on ‘modern’ Marshalls) with, I think, a 1936 cab and that was a lot louder and better.
2) I tried out the DBS 9400 (I think – the 400W bass hybrid with 4×10 and 1×15) and that really did surprise me. I got straight onto the ed of the mag I worked for to get it reviewed. I don’t normally like SS power, but the 12AX7 preamp had a very nice valve sound. Reluctantly, I turned the valve/SS blend knob expecting almighty sux but the character change was very neat. It got me playing in a different style to the usual, and that’s always a compliment for a piece of kit.
I was hoping to ‘score’ an amp myself today, but it went past £150 and I let it pass. Everyone knows about those little Musicmaster Bass combos these days (pity).