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can you please share a frequency response plot of this headphone with us? i'm curious... thx...

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Below you can see the defalt écoute audio TH1 frequency response curve (FRC) in green compared to the traditional Harmon Curve (HC) that most headphone use for a target shown in gray. What you will notice is écoute FRC has a stricter/higher fidelity interpretation of the original signal than the HC which lifts the bass and sub-bass ranges as will as the upper-mids to counter balance the bass lift.
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The default for the TH1 might sound like the bass is a little soft to those who are used to hearing thier music with boosted bass. However if you are used to listening through studio monitors, the TH1 sounds very accurate. Neither are wrong, just personal preferences. If the default tuning is not exactly what you want, the écoute audio app gives you to change the default FRC built-into the firmware of you headset to whatever your preferences are—more bass, more treble, a specific curve, etc. In fact, one of the presets built into the app that you can choose from is the Harmon Curve (see screen capture below showing the app interface).
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If you find that none of the built-in presets are quite right, you can also go full-custom and create up to five personal curve settings. Once a curve is saved to the headset it becomes the default setting and even works with a wired analog connection and without the app running. The app allows 24dB of gain adjustment for eight frequency stop. It also allows you to override the master volume limiter and increase the volume potential to 120db (from th 105dB default). Firmware updates can also be installed using the app future protecting your headset by allowing you to take advantage of any improvements we make to the firmware.
Okay, so, this is where the measurement issue came in. The Harman curve shared has not been compensated to the HRTF of the B&K rig being used while the headphone has been compensated to it. Below is a graph of a slightly modified Harman target being compensated to a B&K 5128 HRTF, which is what I assume you are using. Now, since this headphone has not been added to a public database like squig yet, I had to do some shenanigans to get a (very) scuffed but vaguely accurate comparison of this headphone against a compensated Harman curve (the headphone is in purple, the "target" being compensated to is the 5128DF, the long lines are the Harman curve compensated against the 5128, all aligned to be 0 at 800hz). When compared like this where all the data is accurately compensated to be on an even playing field (as all headphone data is viewed in modern day), then your headphone has a reasonable frequency response. My issue was not what your headphone actually sounds like, it was that the graph you originally displayed was meaningless.
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sakamoto_enjoyerYou did a much better job than our graphics guy did with our engineer on vacation. Thank you! Your mock up is a much better and is more direct comparison between the two curves. I wish I had access to your graphic when the question was asked. In your improved graphic you can clearly see the deviation for the HC that you can hear in the default setting on écoute. However, since the user can change the response curves at the firmware level to their preference using the tuning app, the default setting curve is somewhat irrelevant. Once a user customized their headset they have a new default curve. They don't need to agree with or accept our sound engineer's curve preference as the best solution for their ears. This is why we don't place any emphasis on the default curve and instead emphasis the custom tuning capability. The headset can sound however you want it to sound. The selling point is not the default voicing, but the coloring, detail, separation and wide soundstage you get from the unique signal path, tube preamp, and dual-mono amplification.
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