Continuing on to more impressions...
So far I've done classic rock, hip hop, electronica and solo piano. How about violins?
One thing I have discovered in france are all the small labels doing audiophile sound and dynamic performances of chamber music. The scholarship is sometimes astounding. Some of it is mixed on the HD800! I don't know how much of it makes it outside of france, I guess everyone has heard some of the alpha recordings. Checkout the stuff with Cafe Zimmermann doing Bach. But I digress. For this test I used a recent release by L'Aura Rilucente Handel & Haym: Trio Sonatas in hi-res. Haym is quite a discovery, a contemporary/collaborator of Handel. His trio sonata in D was a revelation, with quite a thrilling Allegro for the finale.
On both headphones you can clearly make out the two lead violins furiously trading licks back and forth, with cello harp and organ underneath. The sense of air around the instruments is absolutely to die for with the HD800 and the instrument seperation is fantastic. Every sound seems to suspended perfectly in space. This headphone was mad efor music like this. And yet, every now and then the lead violin is just a wee bit too strident or sharp. I suspect with my no longer young ears, this bothers me less than some.
The HD800 S on the other hand really nails the timbre and the decay of the instruments which sound a hair more natural. It seems to be just enough less strident on the higher registers than its more experienced sibling. This comes at the expense of air. The difference between the two is small, but very definitely there. It isn't like I have to go back and forth ten times and listen really closely to discern a difference.
Ok, At this point I decided to switch amps. I leave the Lehmann with its two SE outputs and go over to the more laborious Icon Audio 8 MK ii with its single output. The HD800 shines on this amp, more holographic sound and less strident than the Lehmann. It is why I bought it. Everything is right with the world once again. Until I switch over to the S, and once again I feel like the timbre is slightly more correct. The S doesn't sound as different on the tubes as its bro, but I still like it better on tubes. And while I have again given up a bit of air and definition around the instruments, in addition to the timbre and decay, I think I get a blacker background. It's a tradeoff. If you are happy with your HD800 as is, I would say you need to audition rather than buy an S on the blind.
So next I try symphony. I am a bit of a freak about Mahler's ninth, especially the second movement. So for this, I chose Kubelik with Symphonieorchester des beyerischen Rundfunks from 1967. Going back and forth between phones, this time sticking with the tubular goodness of the Icon, it is all becoming pretty clear now.
Tympani go a wee bit lower and hit a wee bit harder on the S. Experience counts though and in this case older bro has it for instrument separation & definition, especially on the complex crescendos. And again on the S the timbre sounds more natural, and less strident. The warmer sound generally works here-it sounds more natural, but it is still a pretty bright headphone. Just a little less so. And gosh those tympani thump soooooo satisfyingly.
I might try some other music but I think the picture is in focus now. I promised someone dear to me that I would sell one or the other. I am a little torn. Probably gonna keep the S. I have put more than 100 hours of listening in.
HD800 more air, sometimes better instrument separation/definition. HD800 S sometimes goes a little lower and slams a bit more, warmer, less prone to piercing highs, even more natural timbre and decay. S better with rock, hip hop and maybe electronica. Classical music, it's harder to say. Both seem to scale with amplification, both like my tube amp best. (I have three amps around here to try). I suspect the S is less amp dependent, but someone with more different amps would be better off answering this.
Lots of people been asking about this compared to the HEK. I think no one can actually tell you which is better, they sound so different. Personally, I don't like the more relaxed sound of the HEK. I did a side by side with the HD800 this summer. I also don't like how heavy it is, my neck gets sore. And finally, I don't have the same confidence in the longevity of the Hifimann yet. And even more finally, $3000 is even crazier money. Too crazy for me with all the other stuff I could buy, given the fact that I find it a side grade at best. If you heard the HEK, liked it and were thinking of getting it, I would recommend auditioning the HD800S. The slightly warmer more natural sound then the classic while retaining most of the precision, makes me think a few of the people tilting to the HEK might tilt back.