dasdoing
Major Contributor
it seams it is EQed to diffuse field?
that means it would fail the ASR target by a mile
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A fun read: a real Sennheiser HE-1 unboxing by a real person
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it seams it is EQed to diffuse field?
that means it would fail the ASR target by a mile
Dazerdoreal
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It wouldnt.
It is somewhere between Harman and (tilted) DF (see attached graphics).
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dasdoing
Major Contributor
It wouldnt.
Headphone Graph Comparison Tool (Premium) – In-Ear Fidelity
Graph Comparison Tool with full functionality for subscribers.
oh well. it clearly targets Harman than.
downloaded this and divided it by Harman over ear 2018
AutoEq/results/oratory1990/over-ear/Sennheiser HE 1 Orpheus 2/Sennheiser HE 1 Orpheus 2/Sennheiser HE 1 Orpheus 2.csv at master · jaakkopasanen/AutoEq
Automatic headphone equalization from frequency responses - jaakkopasanen/AutoEq
github.com
Dazerdoreal
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I've intentionally aligned the DF graphic in a certain way to show where I think the inspiration from Diffuse Field comes from; namely in the range of 20-1000hz. The bass and its transition into the lower mids is more reminiscent of a tilted diffuse field curve than the Harman curve imo.
You could probably roughly deduce Sennheiser's df target from the measurements we have from crin and oratory (and Resolve as well now I think).
Some other Sennheiser headphones like the HD800 and HD800S have this accompanying "diffuse field" graph which could be cross referenced.
There are even spec sheets for some much older headphones with a graph on, such as the HD580, though it's very small and untitled so might not be the same compensation. HD565 Ovation does say "diffuse field frequency response".
(see also: HD490, HD570, HD265)
dasdoing
Major Contributor
they have probably determined an own diffuse field target many decades ago with from the modern perspective medicore tools and room
The interesting part of this system is that part of an amplifier (some transistors or something? I'm not sure) is actually placed in headphone cups
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