Well they must be hard to find as I have been browsing these forums, watching Youtube video's from the likes of Innerfidelity etc.
But it seems like I am at the right address by asking you. I absolutely enjoy the Purpleheart edition but I am searching for a bit more timbre in the upper midrange. Are the Teak/Ebony that more balanced in that region in comparison to the PH's that it's worth getting another variant?
I don't want to dampen or mod the headphones as I am loving the unique wood resonances. Which version would you recommend to me
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well, any of them would be an improvement on the Purpleheart's upper midrange, as the purpleheart is by far the most scooped at 3-4kHz. The Teak is the most balanced and has the most even mid range. After the teak, rosewood probably has the next most even midrange, followed closely by the ebony. Ebony has the most even bass. Teak has the most extended, smooth, non peaky treble. Ebony's and rosewood's treble are pretty even. Mahogany and purpleheart are a bit spiky in the treble, but not bad by any means.
Now, all that said, I don't think it's worth getting another variant, as in describing these differences, it makes them seem much larger than they are. Regardless of wood, these headphones all sound 95% the same (unless you got an off copy or something).
To me, they are all very subtle variations. Purpleheart is a slightly more fun, slightly less refined headphone. More V shaped with a little bit less resolution. The teak is the most refined. The ebony and rosewood are sort of the balance point between them. Mahogany is kind of like purpleheart light.
Some of which you like will come down to preferences. But there are objective reasons outside of frequency response as to why teak, ebony and rosewood are just a tiny bit better performers. They ring a little less and have a bit better soundstage and resolution. Because they ring less, phase and frequency response between the opposite cups is a tiny bit better, leading to very slightly better imaging accuracy.
But yeah, if you love your purplehearts, no reason at all to own another one.
You can also dampen the metal parts of the driver if you don't want to lose any of the "wood flavor" which will have the effect of cutting just a tad bit of ringing, which will clarify bass and smoothen treble just a touch.