I leave my A7X monitors at 0dB. As for your palm muted chugs sounding woofy... that could be a number of things. Simply dialing back the bass in your amp settings could help. You can use Output EQ on the Amp block to bring down some of the low frequencies as well. But it could also be the amp itself, or don't forget the IR you are using. There's so many other possible ways to rectify this, and others might have better advice than I do. As for that chuggy palm muted sound, when I'm going for that tone I have a tendency to stick with Leon Todd's IRs... there's one floating around I like called 'LeonTodd V30-GB Mix NA'. Leon also has one on Axe-Change called 'LT TV Mix 7' that I find works great for high gain and chug. Quite often when I find a preset that I like a lot but sounds too dark, I just plop in Leon's IR and it becomes completely usable to me. On that note, thanks so much for these IRs
@2112 - it has made a world of difference for me and my quest for tone.
Also,
@GuitarGuy316 - if you post the preset you are having issues with, I'd be happy to try it out here to see what I think. I'm no expert but I'd be happy to provide my thoughts. Like always though, preference in tone can be completely subjective.