Sorry, but that's not possible. Looking at the frequency response plots and comparing those with the distortion plots taken elsewhere, one can see that its not just a case of EQing but that there is an underlying distortion mechanism that can't be cured by simple EQing. That's plain physics...

What you are after is a common mis-concept, supported by those that are interested in making profit by telling you that you are "missing that last bit of sound quality" because of too low resolution. Well, you can get a Hifime DAC for less than 100 bucks, feed it with clean power and an...

Currently this may be your best guidance available: Keep us posted if you really venture into that.

A variety of different non-boutique sources, DACs and amp stages, easily capable to bring out the very best of cans. But admittedly I skipped my attempt to create a test setup on my dual mono headphone amp to mimic symmetric / four-wire cabling on the K812, as all listening experience already...

If you are after learning on how to develop and refine your skills in picking up and discriminate sonic signatures, please forget all that A/B blind listening test science bull s crap. All you will get out of this is to go nuts. Instead, I suggest to not ! listening over and over to the same...

Thanks a lot for that !!! Seems to be the same money making machine idea like with Lucas / THX, Dolby Laboratories and others, who's stuff is 80% lawyers .

After roughly 100h of break in, the core signature of the K812 has not changed that much. Having done a lot of further iterations with different cable arrangements, I've come to the conclusion that - in stock form the AKG K812 doesn't provide the flag ship SQ its touted for - the cable is in...

Its a very narrow frequency band that is perceived to be overly "distorted". As said, in the Köln Concert album its a single key that sticks out. Like Jerrett were playing on a broken or mis-tuned piano. Tyll in his review on Innerfidelity linked it to cone breakup taking place at 2-3kHz which...

Thanks, UtaA Meanwhile I was fiddling with cables to get to a symmetric / four wire setup. What really smashed me is, that the SQ of the AKG K812 seemingly is in such a degree dependant on the original cable, that one could say that the SQ upgrade from the K701 or K712 in clarity and PRAT is by...

So What settings and plugins in sonar works are you guys using for the AKG K812 ?

There was also very long burn in time with my AKG K701. The K712 I didn't buy new, so I don't know. In my short review of the K812 I deliberately didn't focused on details, as these may significantly change after burn in, but the characteristics of its outstanding precision versus its...

For what its worth: After the very first minutes, right out of the box with no break in whatsoever, I admit the AKG K812 caught me on its performance in several areas, that really sets it apart from the K7xx line, cranking SQ up one further notch, at least somehow. What sticks out for me was...

Thanks a lot. Will see if I will come to the same conclusions. Ordered the K812 specifically for that comparison. LOL There really is no need to present "my" scientific results. Its been done already and well understood for centuries. The point in symmetric (which is kind a missleading term...

Sorry, you are totally off the point. Re-read my posting, there is nothing to "belive" in four wire cables, its rock solid physics I'm talking of. It has nothing to do with "symmetric" in terms of symmetric impedance matching used for signal transfer between gear in favour of maximizing signal...

I'm honestly interested in what regard both you find the 712 any inferior? Same motor, same flat wire coil, more or less the same diaphragm, slightly different choice in tuning the tonality as to available FR measurements. Also, I guess no one of you had heard the AKG712 modded to symmetric /...

IMO the Harman Kardon Moloch does no good to AKG I suggest to ditch the K812 and replace it with the excellent K712 which is easy to mod to four wire / symmetric: https://www.diyaudio.com/forums/headphone-systems/330362-modify-akg-headphone-k702-k702-65th-anniversary-q701-k712-symmetric.html

Actually I don't like the current D50 ESS DAC that much. Thats not to say that its necessarily the ESS chip itself, as for example the "ancient" NuForce uDAC-3 also uses a ESS chip but is way ahead of the Topping in musicality. So, to me its not stupid to put my money on the Intona USB...

Thats the point I made regarding second order effects. Me think, that those items you heared a difference did run into such limitations. Bad design practice in other words.

IMO you are not supposed to hear any difference. The science behind that filter hype is the science of bull s crap sales speak. The ringing and pre-ringing pictured everywhere is occurring only, when Nyquist barrier is overstepped. So, if the recording engineer knew his job, there is no signal...

Thats because XMOS etc USB implementation sucks even more than SPDIF. Try this one, and you most certainly will change your mind regarding audio over USB versus SPDIF: https://pro.intona.eu/en/products/7054 go for the even more expensive 2,5kV version. Had both side by side for extensive...

The oompf and sound stage are most probably not to be altered that much by opamp rolling but by improving PS decoupling between channels from the DAC chip down stream just my 2ct Looking forward to you findings at your second attempt :thumbsup:

Thanks a lot for sharing your impressions. I'm looking forward to that dual mono design as well. Regarding that bull s crap pictures seen elsewhere about filter ringing. This is just sales crap, creating just another audio myth. Why? That ringing pictured is not any real under real operating...

Gave the detour over SPDIF a quick try, as I have a long time used and well known nuforce uDAC available that offers asynchronous USB mode as well as having SPDIF out. https://www.optoma.com/ap-nuforce/product/μdac3/ So my setup was: Laptop (powered from battery) > Intona USB isolator >...

By the way, what is the sonic difference if you take out the EITR and go by USB into the M9 powered by the external 5V ifi ipower, compared to your current setup?

I for one would never ever consider to go the detour through SPDIF. SPDIF is no bidirectional connection, thus no asynchrounus mode possible, thus the clock at the DA conversion - the one and only point in audio chain where it really counts - must be extracted from the digital signal and...