Andy, I asked this earlier but didn't get a reply. I hear some fuzz in some of the demos. Are you turning the treble gain down to dial that out? I assumed that too much boost of the bass channel would be the culprit. My assumption was based on carefully looking at the knob settings in some demos. Several made it appear that the bass gain being turned up was what introduced that fuzz. And, not that it's a "bad" thing to have the fuzz. For some tones, I'd want it. But for others, definitely not.
That's because I'm ignoring you!
Nah, of course not!
I just want to clarify, are we talking
fuzz, as in low and low-mid fatness and saturation/compression, or
fizz as in top end sizzle?
If we're talking fuzz - yes, it's a fat sounding amp. I wouldn't call it full on fuzz with non-extreme settings, but the low end isn't super punchy, it really is like the low end you would hear from Hendrix, big, full, blooming and blowing up the more things are turned up.
Fizz, no, absolutely not
unless the master is running under 2, or the treble channel is exaggerated with the bright switch on.
The balance between the treble and bass channels, it's really hard to say how it will be different from one person to the next, because there's so much variability in how they can be set. I like to turn the bright switch on with HB's, which only affects the treble channel, and then blend that with the bass channel for just the right amount of sparkle. The bright switch is pretty powerful, which is why I'm usually running the treble channel lower than the bass. Usually no more than 7 on either channel, and not both set that high simultaneously. But regardless of where they're set, and what the EQ balance is, the lows still have that blooming character.
Maybe a better way to put it would be an example of tones.
On the one end, there's a Plexi tone like this, the masterpiece that is "I Believe in a Thing Called Love." Hear the "kerrang" and percussiveness of the low end (disclaimer, I suspect there's at least a pedal at work there, too)
Another good example would be the guitar tones from "Back in Black," which I won't bother posting because we all know that one.
On the other end, there's this:
Which has less specific focus on the barking midrange, everything is balanced but the low blooms rather than having a sledgehammer attack.
I'm probably not addressing exactly what you're asking, but if you can post some similar examples and point out what you hear, maybe I can help more?