This is a so true statement!! A lot of folks who complaint about the Axe fx not sounding like a raw amp in the room don't understand the nature of the Axe itself. It is design to get a polish pristine recorded guitar tone out of the box. I remember playing the real JCM800 for the first time in the early 90's in hope to get that Damn Yankee or whatever 80's glam rock band sound, and was I dissappoint!!?? I was like, hey, these guys are all using this thing, still, it dosen't sound even close to that tone I hear on those records. After learning about mixing and post production, I understand. Those record had tons of layering guitar tracks, heavily process, compress, eq, to fit the mix. So, I could never be able to produce this sound I loved so much out of my mighty JCM in my living room...until the Axe fx came. And I can even have this in the room JCM sound out of it, but what the hell, it sucks, I much prefer that polish like the record sound out of it!! And for those of you who expect to get that wall of Marshalls feel playing through near field studio monitors, forget it. If that's what you're looking for, play through 2 real 4X12 cabs or a frfr system like the atomics powercabs. And please, if this amp or this one is too bright or too dark, use eq, amps knbs are eq, if this is not enough, use graphic eq, parametric eq, this is why you have those in your Axe, to shape the tone to your taste according to the room you are in and the volume you are playing at!! This is democracy if you ask me!!I think people have a dream of an idealized 800 tone, its been on so many recordings... but that's post mixing/mastering which is not a raw 800 sound at all. This causes much confusion.
On its own the 800 is not a beautiful sound IMHO. It barks at you. Its an amp designed for the mix of a live band first and foremost. Bluntly, the real thing always sounded harsh to me until it was looking for EQ space with drums, bass and vocals, then it fit but I was usually rolling the treble down, turning the cab off axis and/or swapping out the tubes for a different curve... That's how a real 800 needs to be handled and it was annoying then too. : )
They are designed to be run loud and the brightness decreases as the MV is increased. The sound of 80's hair metal for sure.
The MV interacts with the surrounding circuitry to form a high pass filter whose cutoff drops as you raise it, so cranking the master also fattens up the tone.
Same as the bright switch on the axe. Fortunately, you can just turn it off.