Manning
Experienced
I run a commercial recording studio in Sydney and please, do NOT run your Axe through the mBox for any reason. You would be taking a top of the line piece of audio gear that would be acceptable at *any* major studio in the world, and running it through a middle of the road piece of consumer-level gear.
The DACs/ADCs in the mBox are very mediocre compared to those in the Fractal, so there is ZERO reason to convert to analog and then reconvert to digital (which would happen if you used TRS or XLR outs).
Go direct via USB, or you absolutely must use the mBox, then do it using S/PDIF (the digital in/outs - see the wiki: Connecting the Axe-Fx II: digital audio - Axe-Fx II Wiki).
The DACs/ADCs in the mBox are very mediocre compared to those in the Fractal, so there is ZERO reason to convert to analog and then reconvert to digital (which would happen if you used TRS or XLR outs).
Go direct via USB, or you absolutely must use the mBox, then do it using S/PDIF (the digital in/outs - see the wiki: Connecting the Axe-Fx II: digital audio - Axe-Fx II Wiki).