I had the JEL 20 and still have the red 1x12 cabs.
I hated the JEL 20. Disclaimer- I only played Strats thru it when I had it.
I found the Bass excessive. The Treble was ear fatiguing, IMO. I blamed it on the EL 84's.
The main issue was the excessive brightness. You had no way of turning off...
I had a MKV for about a year. It was a very good amp. I just did not like some of the modes at all.
I also had a JP2c. I thought it sounded boxy. It gave a sound like I was playing through a 1x12 when I was really playing through a 4 x 12.
Even with the EQ scooped, it was too boxy sounding.
When...
old school.
He used the Reel To Reel Tape Recorder for delay and it's overloaded input as a boost. Marshalls are 200 watters but modded with a MV.
Definitely Treble Booster in there (used his entire career)
He used the same rig when I saw him the following year at Rainbow's first two US shows...
I played it all morning. What a great sounding.Strat.
Once I tweak the set up my own specs, it plays great. There’s something about that big fat baseball bat neck, and those big frets.