Compared to my Mk V 25, or my old Formula Pre, or my older Tri-Axis.
I'm having trouble getting a warm, full clean tone from channel 1 on my big Mark V.
But I tried swapping V3 anyway, since it affects Ch1. (Left V1 alone, since Ch 2 and 3 sound fine)
The 12AX7C was a bit lower gain and...