Even the Harman Curve is based of the subjective preferences of users that participated with the research. It's still a subjective opinion at the end of the day and with regards to tonality, I'd rather recommend someone with good distortion characteristics (i.e. mentioned in the first post) and a FR curve close to their desired tonality then just "lightly / fine tune" EQ the headphone to whatever FR curve he/she desires or suits their HRTF. At the end of the day it all boils down to their preferences and not to Harman or whatever target curve that exists in the wild today. As I'm more into IEMs than headphones, I've heard one of the closest to DF-Harman Curve tuned IEM which is the Moondrop Blessing 2 and I find it sounding unnatural to my preferences. None of the headphones that I prefer (HEDD and Focal Utopia) even remotely comes to that Harman Curve and yet those headphones put the biggest smile of my face since their native (no EQ) tonality suit my preferences immensely.
The Harman
Headphone Curve is not
just based on the preferences of the people on the study, but the basis of the curve started out as a preferred speaker in the Harman Listening Room....so they measured that speaker with a dummy head to work out the basis of the
headphone curve, and it was at that point that they trialed it on a group of listeners where they were able to mess with broad tone controls to reach their preferred target. So my main point is that there was a measured basis to the start of their headphone research (dummy head), which was then tweaked to user preference by subjective means......so when you talk about "
subjective preferences" in your post that underplays the "rigour & science" behind it. The Harman Headphone Curve certainly is not just a "subjective opinion" to quote you again.
There is more to a headphone than it's frequency response though: comfort / useability / soundstage / distortion.....and probably some other factors that I've forgotten to mention or don't know about, ha!
As someone who is the 1 out of 3 people who do not prefer the Harman Target Response, I'm glad you mentioned that. Too often the Harman Target Response is lauded as a one sized fits all solution. I can't wear one sized fits all hats, either
I also think there other ways that too much weight is put on the Harman Target Response as the solution to headphone choice. For example,
- It stands to reason that a one-sized fits all solution is not necessarily the perfect fit, but a good enough fit. So even in that 2 out of 3 group, for example, could be someone would like a little more midbass to give their headphones warmth. Or someone else might like a little more air to their treble.
- People listen at different volumes, which will affect bass and treble perception, and the Harman research must necessarily be keyed to some standard average volume response.
- I've seen headphones that are kind of close to the Harman Target Response offered as necessarily "better" than one that is less close, even though the Harman research doesn't tell us any of the nuances of listener preference who like the Harman target Response once we move away from it.
- And headphones that are close to the Harman Target Response may still have a flaw that bothers some users. For example, a headphone with a treble response that emphasizes sibilance could easily be less preferable for some people to one that is a much worse match to the curve.
- Many of us with multiple headphones enjoy headphones with different sound signatures because of what they bring out of the music in different genres. For example, I find Grados quite fun for listening to rock if I'm in the mood to focus on the lead guitar. But not great if I want to listen to the whole band and hear the bassline. Which runs counter to the one size fits all notion. So maybe the one size fits all solution is not true if someone mainly listens to a particular genre or for a particular element of a genre.
- Soundstage or resolution might trump better Harman Target Response matching among some in the 2 out of 3 group.
So sure. The Harman Target Response is obviously an excellent idea for creating a headphone that could gain very good acceptance in the market, which is what Harman was after. And sure. It's a useful tool for talking about headphone preference. But I think we need to be cautious about over relying on it.
Yeah, for sure, Harman Headphone Curve is for sure not a one size fits all, but it's a good place to start & to recommend unless that person knows categorically that a Harman Headphone Curve doesn't suit them.....but there's not too many folks that really know that it doesn't because you'd have to EQ whatever headphone you got accurately to the curve to start with, although the number of people that would have tried that is probably relatively large here in this ASR community right here.....but if you're recommending to newbies (new posters) here then most of the time I suppose you could assume they haven't done that before and haven't tested the Harman Headphone Curve on themselves yet, so Harman Heaphones would be a good starting recommendation in that case.
"People listening at different volumes...." you say, that is mainly influencing the amount of bass required - more bass required at lower volumes.....you'd just EQ up the bass a little more using the Low Shelf Filter that Oratory supplies in his EQ's (if you're not using your own EQ).
Yes, definitely, the Frequency Response isn't the only factor of importance in a headphone (I listed a few of my thoughts on that earlier on in this post replying to majingotan).
I suppose also in recommending a headphone, you have to find out if the user is gonna be EQ'ing them....because if they are gonna EQ then it doesn't matter too much what the existing frequency response is.....well it matters less.....but if it's too far away from Harman Curve or if there are unfixable peaks & troughs then you're never gonna get them that accurate onto the Harman Curve - so it's important to be aware of the frequency response curve for a headphone for things that can't be fixed or limitations that are on show. Generally you'd pick one that is close to your ideal target as long as it had all other good/required features/qualities.