Also managed to get my friend to get one with that video Z, now his 712 got less love, I got to have him come to bring the 58X and 712 to compare to my 1000x so we can have a 3 way shootout!
are the 58x Jubilee the same as the Massdrop HD58x?
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Yes. The names are used interchangeably. Originally they were based on the HD 580 Jubilee. However, most people feel they have been tuned to sound like the HD 660S.
From The Drop (Massdrop) site:
âIn 1991, Axel Grell joined Sennheiser and designed the HD 580 Precision: the headphone that would launch a much-loved seriesâand the peak of the companyâs audiophile headphones for more than 25 years. Four years later, to mark its 50th anniversary, Sennheiser released the HD 580 Jubilee, which would later become the HD 600 and lead to the HD 650. In the spirit of the HD 580, with current technology and optimizations learned throughout the seriesâ rich history, weâre excited to release the newest evolution: the Massdrop x Sennheiser HD 58X Jubilee. Tuned by Axel Grell and Massdrop based on feedback from the audiophile community, it features new 150-ohm drivers and a colorway inspired by the HD 580 Precision that started it all.â
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thanks Yannick, just placed my order for those and the Koss 75âs. 
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I was just reading this âgrainâ thing of these headphones written by metal571.
https://www.reddit.com/r/headphones/comments/bf1tqb/58x_and_shp9500_treble_grain/
This guy didnât even bother to describe what grain is. Itâs not related to FR, itâs definitely not distortion, and we canât measure it.
I guess he has mistaken sub bass with grain. Because yes I can confirm HD58x is more âtexturedâ than COP but with reducing sub bass, it is even smoother than COP.
Grain is (from my knowledge) typically harshness an a certain freq range. Treble grain would be harshness in the treble, causing things to sound unnatural.
Edit: the phrase is also commonly used to convey unrefinement in the presentation of a freq range
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Thatâs true but as far as Iâm aware, the original meaning of grain is used in analog audio or really poor made DACs or headphones. It means high THD at midrange or highs, which I canât name a modern equipment having this problem.
But metal said you just have to listen to it. He clearly doesnât mean grain as high THD. Thatâs what annoys me cause I canât just borrow his (or the people who hear this grain) ears and realize what he means.
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Yeah, I kinda wish there was an easier way to describe things without having a bunch of subjective phrases that mean different things to different people. I just gave a definition that would make the most sense for the 58x, since like you said, there really isnât an issue with high thd
HD58X vs HD650 for mastering. One test with the same little demo song.
Just received them⊠and I thought my HD280 Pros were more or less the most detail I could hear from any pair of headphones⊠damn, I was wrong.
https://www.npr.org/sections/therecord/2015/06/02/411473508/how-well-can-you-hear-audio-quality
I took this test and, for the first time, Iâm shocked to find the wav files instantly. Like, âwoah, here it isâ. Even when the one I clicked before was the 320kbps mp3. 
And theyâre open-back. And the window of my room is open. And Iâm half asleep.
Well, holy shit. 
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That grain tho?
LOL. Enjoy!
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Maybe he found that because theyâre analytical AF from 10khz to 20khz+⊠look at the CSD. Whatâs that, 0.1ms?! Even planars⊠Hell, even stax arenât as fast as that!
He might have something against Sennheiser? Have said things of other Sennyâs headphones as well as this one. Things that are not true and noticed by many others as well. Ainât like he said.
Cause of these, do not like metal anymore or his vidâs. We are not perfect but still. Mistakes are made.
Yeah Iâm not a fan of him generally. He compares HD58x with 598+eq. Thatâs just silly.
Iâm saying, if by grain people mean oppostie of smooth, then yeah HD58x is grainy. But this grain is what I like 'cause I like detailed and not so smooth sounding.
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Two negative things I always read about these headphones are actually the things I like about them.
grain, which is actually textured sound, and not-so-detailed headphones because these are actually more dynamic. diyaudioheaven describe it perfectly in its 660s review:
And thatâs the case with these headphones too as confirmed by many people hearing less details.
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Just so you know, Iâm actually listening to them, loud⊠with my Samsung Galaxy Note 3.
In the red (orange) volume zone, but still. They definitely donât need an amp.
(Hey, would they be less âdynamicâ and more âin-your-faceâ with an amp? Or just louder, with the same amount of dynamics?)
By the way, Metalâs favorite headphones are M50xâs and LCD-4s⊠They both have in-your-face details (and like, zero dynamics compared to 58Xs?)
Jesus, M50x?
Iâm not saying liking more compressed headphones is bad 'cause you can, well, hear more details but these details arenât supposed to be heard that loud. Thatâs the case with bossted treble too.
But calling a more dynamic headphones weak is beyond.
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I know I have hearing problems. In a car, with music playing, when Iâm in the back seat and someone in the front seat talks to me, or vice-versa, I have trouble hearing them. I can hear 17khz and more, though. With the HD58X I donât have to âconcentrateâ to hear anything (flat frequency response for the win!) â itâs just all there. But I noticed the dynamics. Some songs sound thin. Some details are⊠â1 foot away from my headâ.
Zeos said M50xâs are âfuck me with detailsâ headphones. This honestly may be my preference too (âŠand I listen to metal music and go to shows â hmm. Maybe Metal went to too much metal shows too 
â and no, I have nothing against him. Just a thought.)
From what I heard like physically listened to from the m50x they arenât really as harsh or as bad as zeos makes it seemâŠbut he is right itâs not a pleasant headphone. Thatâs coming from a guy that loves a non eqâd dt990. My buddy who loves metal loves the m50x but he hasnât really tried much beyond that. The issue with the m50x it would be an ok headphone if it had any type of soundstage and separation but like everything blends sort of a not good way. For reference I use. Tin t3 when Iâm out and about not o. My desk and that iem does a better job at being a headphone than it it actually has soundstage and separation. And thatâs the issue the m50x just straight up get soutclassed in itâs own weight class by Sennheiser, beyerdynamic, and itself with the m40x.