This is also my experience, and in line with the measurements described in detail here:
https://www.head-fi.org/threads/dan...nts-impressions.964852/page-129#post-17490651
Here you see somehow the relations. Due to the size of the miniDSP EARS you may not get a perfect seal in some positions, but that is also the case with the shape of your own head.
There is also another effect (related to the shape of my head, where sources that should be in the middle of the sound stage are shifted a bit to the right side of the sound stage if I wear the headphones pushed to the back on my head.
I therefore normally wear the headphones pushed a little bit forward and downward, in line with Dan's recommendation, but tilt it a bit so that the bass response is sufficient present as well. What helps to get a good seal is to push the phones from the sides to your head, compressing the cushions, and loosen them. I think it is a matter of trying this by yourself, and see what works for you.
I also EQ a bit, dampen the ~3kHz peak a bit (less nasal; side effect is "less presence"), lift the upper treble (to give it a bit more air especially when dampen the 3kHz region), dampen the overall treble (to not overdo things; I think the Harman target is pretty "hot" here) and give it a bit more harmonic content by lifting fundament area (in line with measurement results) and mid a bit (personal preference; I like to hear the wooden frameworks of guitars and pianos). Especially for acoustic and classical music these sort of settings give it a touch more ambience; instruments get more harmonic content, and orchestral outburst come with the sort of energy I'm used to in live concerts. Such settings depend on the exact position of the headphones, and also on personal preference. Every recording is mixed on certain equipment, and therefore will have a sonic signature embedded by the sound engineer making the final mix, so going for the perfect neutrality is a goal, but not necessarily bring you closer to the artists intent.
A headphone is more than just its frequency response. I think the Expanse is way more than just a good frequency response. It has some holographic touch, energetic homogeneity,
and clarity (low distortion) that makes this thing pretty unique. I didn't hear that with the Stealth when listening to both of them, but I have to admit they were playing at different electronics, so my observation cannot be translated to a definitive conclusion.
#HappyWithMyExpanse