Was lucky enough to play through a first-run, pre-JJ 5150 III 100w right when they first came out. I still can't get that tone out of my head. Just an incredible sounding amp. A year or so later, I played through a friend's brand new JJ loaded EVH and I couldn't believe the difference. I couldn't stand it. I'd just experimented with JJs in my Bogner at the time and knew right away why I didn't like his EVH. They impart this overbearing mid-range honk that I don't gel with at all. I'm always surprised when I hear players talk about how much they love JJs because I'd go digital before I ever used them again. Maybe they just don't play well with low-mid voiced amps like the 101B and EVH.
That sound is all over 'A Different Kind of Truth' and a number of live clips from the first few shows on that tour unfortunately. Then at some point EVH decided to yank the JJs (not sure what he replaced them with), and clips from those later shows are worlds better.