Hifiearspeakers
Headphoneus Supremus
I believe you have to look at the measuring equipment and settings as well. Audeze FRs are only comparable to Audeze FRs so maybe that 20db dip isn't really as severe as it looks. Point I'd take home is that there is a dip vs the quantity of dip. I'm still waiting for the FR on my 4s but really curious how it will compare with Dave's 4Z.
I am equally curious. Audeze gets so much right, especially their bass and lower mids. If they figure out how to match those lower octaves with the upper octaves, it will be a game changer. They’re so close to perfection.