Did you find the mid/treble response decreases all that much with the dot mod?
Not particularly, no. Seems to mostly target existing peaks.
BTW, I ran some sine sweeps on the AD and do not hear a null around 4KHz. I know there was a bit of discussion about that. You can hear the emphasis around the 4-5KHz and 7-8KHz spots, but overall seemed fairly smooth.
It seems the 500Hz-1KHz spot had the most channel imbalance and "wiggly" response (fairly even overall, but had a lot of micro-variations). On the Hex + Vali, I heard some channel imbalance and overall what seemed to be a slight droop in the 100-400Hz area, though switching to the Creative SB1240 (as DAC, using HPO) didn't seem to present this imbalance (slight droop in that area is hard to say, but possible based on my subjective listening and measurements). Everything else held the same, so it's likely it was just a small shift that got the AD to better fit and seal around my head. Perhaps not, but, either way, not too worried about that.
Even after a couple hours on my head, I still find it quite difficult to get a proper fit and seal. I'm always messing with them and essentially have to sit fairly still once I get them right. The Mad Dog has no such issues...seals and fits like a charm every single time with very little adjustment needed. Why is this? I adjusted the headband a bit on the AD to better fit my head, and that did help some. Still, the MD headband isn't shaped to fit my head as well, so I'm not totally inclined to believe it's related to the headband. Of course, with the custom cups and how they "work with" the rods and sliders, that could explain the difference.
