I was just trying this today with my PF350 paired with a SVT410HE. Playing a MIM Fender Jazz, with both pickups and the tone wide open, I set the amp gain until the peak light just started blinking (3 o'clock). I find that the tone is better with the gain pushed. Then, with the limiter on, I set the master until the limit light just started blinking (2 o'clock). Finally, I switched the limiter off. Bass was at 1 o'clock, mid at noon, and treble at noon.
I found that this setting provided the maximum loudness I could get, while maintaining what I consider a good tone, without any farting. I did discover my first dislike with the PF350. The limiter is too harsh, IMO. Still, with this setting, I would not worry about blowing any drivers in the SVT410, even with the limiter off. For me this was plenty loud. I would not want to be on a small stage for long at this volume. Larger venues/bigger stages may need some FOH/monitor support. YMMV I would be interested in hearing other responses.
Awesome. This is the kind of info I was looking for. I know I'll eventually figure it out on my own, but I haven't had many opportunities to play "loud" lately.

It was a clean-clear sound. 