Hi, I took some time tonight to do this EQ for you using
@Resolve 's measurement (for the
Drop DCA Aeon X Closed), here it is, it was a little tricky to get it accurate to the Harman Curve, but I generally managed to do so without using excessively sharp filters, find the EqualiserAPO config file attached at the end of the post:
View attachment 153925
It was tricky because it has those massive and very wide elevated treble spike area above 10kHz so I had tried a few different approaches to deal with those. I chose to use a Q2 filter on that area which I hope is wide enough to make it relevant for when you wear the headphone, because frequency response above 10kHz is unreliable so therefore you don't want to use narrow filters in that area. If the EQ sounds immediately strange to you then switch off that filter I'm talking about....Filter#10 which is the 12,140Hz Q2 filter and see how it sounds without that, if that doesn't help then reactivate that filter. It makes me wonder if the wide & sharp peaking area above 10kHz is a measurement error or a unit variation problem, because I would think peaks of that degree in that area and so elevated over a wide area would be literally quite painful to listen to, so it makes me question whether the measurement is reflecting reality - but as I said you can turn that Filter#10 at 12140Hz on & off to see what kind of an effect it has.
You can tweak the bass level to your taste using the 105Hz Low Shelf Filter which is Filter #14 in the pic, the last filter, (my EQ as it stands is Harman level bass as you can see). You can tweak the treble to your taste above 11,000Hz using the High Shelf Filter at 11,000Hz which is Filter #9 in the pic.
This EQ uses a -3.3dB Negative Preamp, and if you tweak my EQ using any further boosts then you'll need to check the total EQ curve to make sure it's not digitally clipping, at which point you'd increase the negative preamp to allow for any boosts you do.
I'm relatively happy with how this EQ turned out visually considering the problems, but it'll be interesting to hear what you say regarding the elevated treble between 10-14kHz which I've tried to tame......as well as your other impressions. (We'll try not to have too many back on forths on this because it's only tenuously linked to the subject of this thread which is in fact a different Dan Clarke headphone)