The renewed attention for vintage Marshall tones coincides with my own search / quest.
I've been experimenting in the past weeks, before Pete Thorn's video, to see if I could use the Plexi 6550 as a single amp solution, using just the guitar's Volume knob for everything. To replace my current "4 amps/scenes method": Clean (Shiva Clean) - Dirty - Rock - Heavy (Shiva Lead).
The reason is that I'm kind of growing tired of the "perfect" guitar tones which seem prevalent in so many rock recordings these days. EQ-'d to death. The Friedman sound: thick, smooth, balanced. Frankly, a bit boring.
I like imperfect guitar tones. I like warts, and dips, and peaks. Clipping, woofy, noisy and bold. Things that make a guitar sound distinguish itself from others. Sounds that let you still hear the guitar coming through instead of only amp gain. Where you can hear the difference between a single coil and a humbucker.
The old Marshalls deliver this. Raw and honest.