I sold my original toaster about 5 months ago when my Axe FX 3 Mk 2 arrived; the AFX3 seemed a lot more 'present' when I played it with headphones or via my studio monitors. I purchased a load of profiles which sounded great, and all was well.
Until last Sunday.
Had the first band rehearsal, so I took the AFX3 for it's first proper outing, along with my two RedSound RS-LG12 cabs, plus a pair of Headrush 108 cabs. What had originally sounded amazing at studio volume quickly became piercing, barking, and farty through the LG12s, and also the 108s. I had a low cut at 120, hi cut at 6.5 (which I then reduced to 5k!), and no matter which profile I used, it all sounded pretty rubbish.
I've just purchased a Kemper rack - sat in my studio, loaded up my old favourite profile (TopJimi Caswell High), set low cut at 120, hi at 6500 and cranked the LG12s. There it is!
It's weird, it's almost as if the AFX3 is 'hyper realistic' in a way, and much more forward and present in it's sound. It sounds awesome at low volumes, but I hated it at high volume.
I've now got a massive couple of notches in the output of the AFX3, which appears to have helped - but I'm seriously impressed (again) with how easy the Kemper is to just get right.