postscript
New member
My amp has all 3 on front.
Presence and Depth are more filter controls as they control specific frequencies determined by capacitors that are used. NFB control is just a variable NFB resistor, no filtering involved.
Here’s the layout on mine:
RedPlated, I'm looking at this (found a dealer I can pre-order) vs a Friedman SSv2 on order. Currently looking for an amp to pair with SLO, and curious if you have any thoughts on overall versatility of the Uber Ultra. How's the clean and spectrum of tones -- can it nail some "lighter" JCM800 tones -- I think the brutality factor has been proven lol. Appreciate input -- choosing a retirement present.