Can anyone give a direct comparison of the H7 H8 and H9? Are the H9's heavier at all? They all look so identical...
I have had The H7, the H8 and the H9 (twice). Aside from the obvious differences, 7 and 9 are over-ear, while 8 is on-ear, and that the 8 and 9 both have ANC while the 7 doesn't, the physical differences aren't substantial. However, from my listening experience there is a noticeable difference in sound.
Of the three I have kept only the H7s. I really like the open lively sound from them, not the richest, but if you want to feel uplifted by the music they do a great job.
I have wanted a set of noise canceling headphones, so tried the H8s, but didn't like the sound in comparison to the H7s, wasn't comfortable with the on-ear design, and did not keep them.
When the H9 came out I was excited that they would have the combination of the H7 sound and ANC. I had a pair very soon after their release, but unfortunately I found that the bass was so thumpy that I couldn't enjoy them. I really wanted to like them, so after reading a lot of reviews that praised the sound quality I tried them again. This time I was scrupulous about giving them more than 100 hours of burn in time, but the result for me was the very similar, thumpy and confused bass, maybe not as bad as the first set I had, but still there. Admittedly it could be made better with equalization in the B&O app, but for me that wasn't an acceptable solution.
At the same time I tested the Sony MDR1000X, the Audio-Technica ATH-ANC7B, the Sennheiser PXC 550 and Bose QC 35s. The ANC on the H9s was nowhere near as good as the Sony or the Bose and slightly worse than that of the Sennheisers. Couple that with the somewhat finicky touch control and sadly I decided to return the second set as well. I ended up keeping the Sennheisers which have IMHO excellent sound quality, good ANC and a great touch control system.
Just to be clear I am a great fan of B&O equipment, in addition to my H7s I have a pair of the mark 1 H6s which are great (better than the mark 2s) and a set of H5s which I use at the gym and find admirable for the job.