didn't run 4022>m148, but did run 4022>eaa, which is roughly 20db of gain, when set at zero, with -35 mic sens. At times, running from a distance, I did have to crank the knobs, even at -10, and sometimes for acoustic music, even WAY fob, had to max them out to get decent levels. So I think it is the 4022's, to some degree. I *believe* you could get more using the screwpots, if you change the settings with the dip switches, but then you'd be as fucked as I am with the screwdriver. And I'm not sure you could even squeeze more gain running that way. After a few shows, I discovered I might as well always run -10.