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Author Topic: Playing with Harman target EQ curve with various hi-fi headphones  (Read 4868 times)

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AZ

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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #10 on: September 09, 2015, 07:39:38 AM »
   For what it's worth, DSP correction curve based on my own measurements of unmodified HD-800 closely matches one based on Harman target and developed by Tyll (pictured above). Specifically +6db at 1.5 kHz is the same as well as -6db at 6kHz as well as +3db at 80Hz and +6db at 30Hz. Minor differences are: at 200Hz Tyll already has 1db added while on mine compensation starts at 220Hz and reaches 1db at 350Hz. While Tyll leaves everything above 7kHz uncorrected mine fixes few minor issues there as well.
   Resulting tonality in my case ends up being quite a bit different from uncorrected original but closely matches DSPd HD-600s (correction curves for both are still very different).
   Just to reiterate, I don't use Harman curve for target yet somehow arrive at the same main correction points. Wondering if our pairs sound any similar with mine being completely unmodified while probably employing a bit more sophisticated correction algorithm.
   One more thing, based on my experience once headphone is being equalized throughout entire frequency range every single db matters, a lot.... . Unfortunately those db's are easy to miss and I suppose that is why EQ is not very popular with neither headphones or loudspeakers.
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Solderdude

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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #11 on: September 09, 2015, 09:16:49 AM »
I don't think Tyll developped an OW alike compensation curve.
He just applied the OW correction curves to his raw measurements.

Don't use the Harmon target myself but do use some compensation in the subbass.
So my plots will be somewhere between OW and raw measurements (on a flatbed rig) when the bass is showing a horizontal line.
An LCD2 will thus show some subbass roll-off when measured.

yes, every dB matters indeed. Problem is are those dB's rig/microphone related, acoustic related or headphone driver related ?
It is nonsense to try to extremely accurately EQ a headphone based on (someone else's ?) plots.
Even between (matched) drivers differences of several dB's can and do occur.
I have measured many T50RP drivers and none of them are the same.
Dips of 10dB and even peaks in that magnitude cand be hard to correct with EQ.

I feel that a 'general' direction (in other words a gentle correction curve) to get it closer to 'flat' works better than heroic EQ based on (incorrect) or other ones measurements.
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Hroðulf

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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #12 on: September 09, 2015, 12:18:12 PM »
This is basically what our company does. In a plug-in and mainly marketed towards pro users.



Supposedly, we're pretty good at it. Feel free to give a whirl - http://sonarworks.com/try-now/
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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #13 on: September 09, 2015, 02:33:15 PM »
I should dig up my HD800 measurements. I don't think I ever posted them...IIRC it was actually quite linear stock aside from the boosted treble, starting with that 6KHz spot and on.
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joeexp

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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #14 on: September 09, 2015, 04:02:46 PM »
Quote from: Hroðulf on September 09, 2015, 12:18:12 PM
This is basically what our company does. In a plug-in and mainly marketed towards pro users.
Supposedly, we're pretty good at it. Feel free to give a whirl - http://sonarworks.com/try-now/

No Audeze, No HifiMan, No Mr. Speakers, NO Fostex  -  Presets! What's Going on??
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Armaegis

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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #15 on: September 09, 2015, 05:01:27 PM »
Quote from: joeexp on September 09, 2015, 04:02:46 PM
No Audeze, No HifiMan, No Mr. Speakers, NO Fostex  -  Presets! What's Going on??

In the grand scheme of things, those are still niche products.
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Hroðulf

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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #16 on: September 09, 2015, 05:23:17 PM »
The consistency with Audeze cans is all over the place. Pretty sure that there won't be a preset anytime soon. With that said, calibration really did help with my LCD-2's, added the much needed treble and got rid of channel differences.
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Riotvan

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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #17 on: September 09, 2015, 06:56:22 PM »
Must say that your plugin works quite nicely on my unmodded 800's(returned them to stock for resale). Haven't found any harshness yet i also don't feel i'm missing anything. Gonna try them out on the crack tomorrow and see how the curve works with a 120ohm output impedence.
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AZ

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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #18 on: September 09, 2015, 07:42:39 PM »
   Downloaded the Sonarworks and checked both HD-650 and HD-800 presets via JRiver/Yggy/Rag. Sounds different from my own DSPd variants. Proper EQ is extremely difficult to do right ... .
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Riotvan

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Re: Playing with Harman target EQ curve with various hi-fi headphones
« Reply #19 on: September 09, 2015, 09:42:15 PM »
Yep i never got it right without modding, that 6k resonance cannot be EQed out. With this EQ it is just a minor annoyance but an annoyance non the less.
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