No idea, but if its being looked into: I'd prefer it's predecessor: the Bruce Zinky designed Fender Prosonic with the extra versatility of its switchable rectifier circuits: Tube A, AB or Solid State. LOUD sucker, I had to use it with an attenuator, and the shared tone stack meant choosing whether the clean or lead channel was going to be optimal: this narrowed channel switching choices for live use, though you could get around some of that with pedals. (not a problem with modeling, though). The Supersonic makes good on independent adjustment to both channels. Fantastic lead and crunch with its cascading gain (both Prosonic and Supersonic Lead) but I don't know how different or unique it may be from some of the early Mesa designs which are alleged to be similar. If it's unique enough: it may eventually show up: if not: other amps are close enough, so I'm not pining for one. (I actually sold my Prosonic to fund the AX8 - Do I miss the Prosonic? - sure, but the AX8 is great any time, anywhere at any volume, and the Prosonic needs to be cranked to reveal its riches - and I couldn't often do that.)
The Prosonic clean channel has a hint of Vox in the A mode which I find beautiful and is different from the usual Fender clean. (the Supersonic has a Silverface type clean circuit). Haven't tried the 6v6 version.
