I had some time to kill this morning so I installed v18.06 and played for a bit. I had intended to go through a few of the recently G3'd amps, give the Rich Hall reverb a go, and play with the LFO bypass reset feature.
None of that happened though. After the update was finished and the AxeFX had been power cycled I verified that all was working before moving on from whatever preset was loaded ('Plexi 100', factory preset #9 if I recall correctly). This sounded SO FREAKIN GREAT that I just kept playing and playing, and I had no interest in moving on from that amp at the presets settings. I'm assuming the improved power tube grid conduction modeling is responsible for the improvements I'm hearing/feeling in this amp (I'll forego the hyperbole and just say that whatever has changed it is a marked improvement from what was already amazing.
After a short while I did switch preamp tube type to 'Long Plate' and I found, once again, that I generally prefer this to the Short Plate (AKA Modern from 18.04).
I also decided to play with the Cab Pack 10 IR's - these really are an improvement in clarity and character over prior Cab Packs, the TAF IR's, and Ownhammer's UltraRes IR's. I do hope the 3rd party IR producers eventually adopt Fractal Audio's Mic+D.I. approach - the results really do speak for themselves. These are far and away the best sounding speaker/cab IR's produced to date IMO. I kept the same preset and previewed just about every Cab Pack 10 IR's (save for the back of cab IR's. Playing a big iron Plexi through a 1x10 Princeton combo enclosure sounded fantastic, as did the 1x12 Ampeg, 1x12 G12T cab, the Bassman 4x10 enclosure, others.
I did switch to the Rich Hall reverb (high quality mode) before I quit - NICE!
Thanks Cliff for another amazing update!