I got my Cab M+ today. Gotta say I'm really struggling with it. For starters, there is a sort of a "digital hiss", for lack of a better term, out of the headphones the whole time. It happens whether I use the headphone out of the CabM or the XLR out to my monitoring device. Also, when I use my MXR Iso-Brick, it's terribly noisy. It's less noisy with its own power supply. I'm having a hard time finding a necessary tone out of it so far. Fiddled a while with the Fridge cab and preamp/power amp settings, and it's getting better, but still hissy. The hiss might be due in part to the dirty, ungrounded power in my upstairs space. I'm going to take it downstairs in a bit and see if it's any better.
Any suggestions for your favorite cab/mic settings would be much appreciated.
Also, on a side note, it seems to render many of my effects pedals superfluous. Like, I have a couple of boosts, a Broughton RFE, and others, that seem to have little to no effect through the CabM, which might be normal. If anything, they just make it sound worse. I have found so far that less is more when it comes to having other pedals, always-on-tone-enhancing things in front of the Cab M.