ugh. drivers are funny again. fading highs. thought i fixed that...
i'm certain that the difference in the outputs is due to the eq issue in cubase and not the drivers; this driver issue is not affecting the way that cubase calculates the out, it's only affecting the way i hear it. so, i'm not getting different mixes as the result of the fading highs, i'm just hearing it output differently. and, i'm actually pretty happy with the existing mixes - there's only a couple of the first 12 i want to change.
of course, i can't mix moving forward if i can't hear it right. so, i'm back to the initial problem. but, i have a different set of bounds to work within.