OK, getting this beast dialed in! Spent some time looking through some of the alternative settings and finding some more suitable tones. I am like 90% on each of the channels and could gig with it today if I had to.
I was finding the JP2C awfully stiff, but got it to open up. I am definitely hearing the difference between knobs pulled and pushed, and finding that to be a nice bit of control that is not overwhelming.
The min difference I feel/hear between the JP2C and my Archon and Shiva is that the JP is VERY tight. YOu can dial it looser or stiffer (JP seems to run his VERY stiff), and then it just ROARS. I get the loosest tone from the Shiva 20th KT88. The Archon has the biggest lows and is a bit more tame in the midrange than the Shiva. The JP tends to be VERY tight in the lows, regardless of how you dial it, and I finally managed to open the mids, so it sits in between the Archon and Shiva there.
The differences are pronounced from what I feel (tight vs. loose), but at this point I doubt many listeners could tell the difference between the three. I am having fun dialing each to its strengths, and using each to push better tone out of the others.
As a result, I am finally hearing some tone limitation from my G System. Every couple of years I have to go through some tuning with that to get rid of impedance mismatch or other mud-causing issues. I have always managed to fix it, usually by unloading some of the pedal add-ons that I keep throwing in the mix.
Of the three, I could get away with less outbaord gear with the JP due to the extra channel. It's cool to be able to use the amp for leads.
I am going back and forth on channel 2 between presence pulled and pushed. I like them both, but need to pick a favorite at some point. I do notice that even at relatively similar effective presense settings, pulled it is more lively and open. I like that, but it can sound thin at times.
I'm still running a lot of gain. Checked the tubes and they are all stock Mesa, no SPAX7. May be a low gain tube, but I doubt it.
Switched from horizontal recto 2x12 to vertical. The Shiva radically changed tone, lost all the lows. The JP stayed pretty much the same. A bit brighter, but sounded GREAT.
I also need to set up the MIDI, which I haven't done.