After some more time with it, it has gotten a bit more impactful and opened up a bit (only slightly, still not enough for my tastes, still not a hard hitter), and treble has evened out but that peak right near the sibilance area is still prominent enough to be an issue for some, a bit less raw sounding overall. Otherwise sound is similar to what I felt earlier. I also should say that it is indeed a slight v shape but I still really like what the midrange is doing on here for a planar at this price, I donât want to make it seem mid centric or anything though since it isnât that, itâs a slight bit recessed but not overly so, perhaps a slight u shape but thatâs not exactly it either because of that weird bass roundness.
Generally I tend to find myself favoring warmer amps with more body, asgard 3 is a very good match for the price, helps smooth treble a bit, maintain that really nice timbre for the midrange, and gives more impact to the bass without over-exaggerating that lower bass hump, gives some nice linearity throughout the midrange and treble, and also really helps spatial recreation out. A monolith liquid spark really helps it out in the treble but can actually sound a bit overdone in the bass as it kinda emphasizes that roundness in the hifiman (but also gives it a pretty large stage), but I would still prefer it over something like an atom or heresy which would get way too sharp in the treble at times in comparison and lost some impact and body in the bass. The magni 3+ does a pretty good job but imo can sound harsh at times which isnât the most enjoyable. It does scale with higher end amps, but personally if you were going to spend in that 500 range amp wise I would just suggest you change to a sundara unless you really love the tuning of the 5xx.
I should also add that itâs actually pretty dang detailed for the price, moreso than I initially realized, so thatâs really nice, and it doesnât shove it down your throat unless it happens to be in that 8-10k sibilance range lol, more detailed than most other cans I can think of in the 200 range
Also more into spatial creation, the 5xx has a bit of exaggerated width and verticalitiy/largeness which while isnât the most faithful to the recording is tastefully done and tends to be enjoyable most of the time. I wouldnât say it has that largeness and grandness of like a hex or arya, but it does have more of it than most headphones in this range imo. I do wish it had more depth to go along with this added width but thatâs too much to ask at this price point lol. Imaging is still very sharp, I have a feeling that these would be good for some more serious gaming but I donât really game anymore (but for casual games I would want more slam and impact)
So far though I really personally wouldnât see a reason to buy the 4xx when the 5xx is only like 50 ish bucks more iirc, itâs well worth the extra cost imo
Edit: it depends on preferences, if you are after subbass performance, the 4xx/400i is still a better pick