Probably break-in.
Newer 1000 series wit different drivers could break in differently than the prior incarnations.
Something I have found worth keeping in mind is ICs used make a huge difference in tonal balance, impact, attack and most other sonic attributes as well.
From my experience, I'm recommending the DNM Reson ICs for use with the OHMs. They are all business only and sound absolutely fantastic, dare I say near perfect in every way.
Newer 1000 series wit different drivers could break in differently than the prior incarnations.
Something I have found worth keeping in mind is ICs used make a huge difference in tonal balance, impact, attack and most other sonic attributes as well.
From my experience, I'm recommending the DNM Reson ICs for use with the OHMs. They are all business only and sound absolutely fantastic, dare I say near perfect in every way.