Comparison with B&O H6
I have purchased H6 because I liked my H7 a lot, and multiple reviews claimed that H7 doesn't sound as good as H6, e.g.
https://marco.org/headphones-closed-portable#h7
Before I purchased H7, I have compared it in the store with H6, H8 and Momentum 2. H7 was a clear winner, and I had no doubts that I have made the right choice.
However, the reviews of H6 were so great, that a few months later I have decided to give it a chance.
I've decided to go with the first revision, as I wanted to experience the more "audiophile", less bassy tuning.
This turned out to be a huge disappointment, comparable perhaps only with my disappointment from HD600.
At first, I thought that it just needed some burn-in (H7 sure did), but the sound didn't change.
Comfort:
H6's headband is wider than Pro 82's, but it has less padding.
Same is true when comparing with XPT100.
H6 pads are rounder and smaller than Pro 82
Same is true for XPT100
If the NVX XPT100 with the ComfortMax pads is 10 out of 10 comfort-wise, and Pro 82 is an 8-8.5, then H6 is a 7.
Surprisingly, it is more comfortable than H7, despite thinner pads - possibly due to lower pressure on the ears.
H6 and H7 pads are not interchangeable, and of course you can't use 3rd party pads either.
Isolation/Leakage:
There is very little isolation, not a great choice for noisy environments.
Leakage is an issue as well.
Bass:
Quantity is neutral, and I wish I could say that about the quality.
Bass is vert muddy, badly controlled. I don't think I've heard bass that bad since Beats Solo HD.
H7 has a MUCH better bass, closer to Pro 82' quality than H6's.
Mids:
Mids are very veiled and recessed, timbre is off. It reminds me of HD600.
Just look at this horrible FR (from Innerfidelity):
It makes the old Pro 80 sound like a mid-forward phone, not to mention Pro 82.
Treble:
As you can guess from the FR above, this is a dark headphone - nothing to write home about.
Soundstage/imaging:
Sounstage is closed in, very headphone-y
The whole presentation is very headphone-y, music is being played "at me", not around me.
Music is coming from a distance, if only I could push it closer to me...
Accessories:
H6 comes with a horrible cable, and you can't easily replace it - since the cable is showed inside the cup, the plug must be very thin.
Here is a comparison with Pro 82 and B8 cables:
However, cable isn't the reason for the bad sound - H7 sounds great with it.
Overall:
Complete and utter disappointment