I just bought these after reading a million reviews online, on paper these sounded like the perfect headphones for me but now that I have them I have to say I'm utterly disappointed!
First of all a few things about myself (feel free to skip this part): I never had any high level audio gear but I always preferred a certain kind of sound with detailed mids & highs, controlled yet punchy bass that doesn't overpower the rest, and wide soundstage. Unfortunately I never had a whole lot of money to spend on this so I always got the best bang for the buck headphones and never spent a whole lot of money on a single headphone, my record was 100€ for the Sennheiser Momentum in-ear. My current favourite headphone is the VE Monk earbud with donut foams, mostly because it's so easy to carry around and it's perfectly comfy for my ears, also with some EQ to improve the highs it sounds quite nice to my ears, details is good, bass is present but lacking (typical earbud bass), and they have nice soundstage (by soundstage I mean sound extension around my head, as I don't really like feeling like the sound comes from inside my skull). Before that I used the JVC Carbon Nanotube cans (forgot the exact model) a lot, and also my AKG K319 earbuds (which costed me 70€ back then) which were insanely bright and detailed with punchy bass (or at least that's how i remember them, they broke a couple of years ago). I also used a lot of other mediocre at best earbuds such as the Apple Earpods, some random mediocre headphones from AKG & Sennheiser, some other low tier headphones from JVC & AKG. Other than that I always use flac and 320kbps files.
Speaking of the Momentum In-Ear, I found them way too bassy and lacking soundstage, so I sent them back. They didn't sound bad, I just didn't like how they sounded, and also they were extremely uncomfortable to my ears. So I finally realized that my ears will never adapt to iems and that the earbuds I like so much aren't going to make a comeback so I decided to go maximum comfy, giant circumaural headphones for my next "expensive" audio treat, with a "controlled" bass and big soundstage. So I bought the HD598 SE for 150€ on Amazon Italy.
Here's my first impression after listening to them for around 3 hours yesterday night, sources used were my phone.
Volume: on my phone (Xperia Z3) the volume is kinda low, but at 90 to 100%% it's adeguate for most songs if not a bit loud. On my PC the volume is insanely high and it becomes uncomfortable at over 50%, so I assume I don't need an amp for these.
Comfort: seems good, I need to get used to them, they also still have some clamping force
Bass: completely non-existant. My VE Monk literally has more bass than these. If I EQ some bass in, it just "thumps" more, but the bass is really dry and not nice at all. It's more similar to someone slamming his fist on a table than musical bass, as it has no extension whatsoever in the low end.
Mids: pretty good detail but extremely boring, flat and unengaging. Detail seemed very good though, but the music was extremely boring to me, it felt flat instead of "textured" and engaging. Voices were very clear but sounded veiled. Maybe because of the complete lack of any kind of bass. I listen to a lot of mid centric music these days, and this headphone even managed to make my upbeat Jpop collection sound boring.
Highs: highs seem good to me, very detailed and not fatiguing. Nothing to say here, this part of the sound seems good to me.
Soundstage: seems good but honestly I expected a lot better, maybe too much. There's a lot of spatial detailing which is something I like. Overall the "size" of the sound is not a whole lot bigger than even my JVC Carbon Nanotube headphones which are closed back.
Overall SQ: extremely flat and boring, everything sounds like it's going through a veil and that these drivers lack clarity. Even compared to my crappy VE Monk the sounds seems kinda flat, not engaging, kinda droning actually.
Weirdness: I noticed that if I close the grills using my hands, the soundstage closes in (obviously) but at the same time the sounds tightens up and sounds more to my liking. As I take my hands off the grills the sounds changes and becomes something I would describe as hollow and echo-y. I also prefer the sound as I press the headphones to my ears, it's like wearing them normally creates some kind of echo chamber inside the earcups that muffles up the sound.
I refuse to believe that A. these headphones are bad and B. my ears are defective, so I'm going to assume that either I got too addicted to the VE Monk (considering I used nothing else for over 6 months) and now my stupid brain is refusing to accept any other kind of sound as "good", or that I'm too tired and because I'm doing a million phone calls at work using my godawful phone headset and maybe my ears are fatigued. I don't think burn in is a thing that changes the sound radically, and so far these sound so wrong to my ears I don't think burn in will fix them. I think brain burn-in is more of a reality, which is probably why I'm disliking them, but something that worries me is that after 3 hours with the 598, I put on my VE Monks expecting to hear them sound awful (confirming it was my brain which needed to adapt), but nope, the Monk still sounded more to my liking (even without EQ, as I removed it to play with the 598), and superior in bass and clarity of the mids (vocals).
By the way, when I switched from my Sennheiser MX580 earbuds to the VE Monk I had an epiphany as they sounded what seemed a million times better, I expected the same thing going from the puny VE Monk to the glorious HD598, but instead all I got was disappointment.