I downloaded Lincoln Brewster's official HD500 presets from here
And specifically, the one named Lincoln_Brewster_Main_2012.h5e
For some reason, this preset is much much louder than any preset I create myself without messing too much with the volume settings.
I've turned off every effect/amp block and checked all of the levels, including DEPs and none are really any different than any settings I use in my patches, and this patch is still much louder than any of my patches.
The only difference I can see is that at the mixer he has both R and L set to Center instead of the default !00% Left and 100% Right. Changing that makes some difference, but it seems like the volume difference is more than just that.
I also changed the extension to .5xe to import on my HD500X. That shouldn't make any difference, should it?
Is there something else I'm missing, or does centering the Mixer block actually really make that much difference in overall volume without actually changing any volume parameters?