For me, bright is simply treble/mid emphasis, as even if the treble isn't emphasized, more mids might also give it that 'piercing' 'quality'; same as bass being bit lower volume than mids/highs... Then there's neutral; bass/mids/highs are balanced. Warm is opposite of bright with more bass & less mids/treble.
Yes though many comment on them being bright, I have never found them to be bright at all.
Wow these are pretty strong words... Older version of 400i I'm guessing? Oh well you can read from the last few pages, but again listening to them & comparing them to Q701, there is definitely
at least a hint of brightness on the 400i, unless it's sample variance and all of that. But again I guess it depends what your reference is. My 2 cents; although the Q701 have been described as bright sounding, to me they sound less bright than the 400i; the 400i has a more mid/high emphasis, and although the bass is present, it is definitely less present than Q701 for instance, in relation to its mids/highs. If you're listening to say vocals which have some hint of brightness/harshness, the 400i will represent it very clearly and when compared to Q701 the Q701 will sound less harsh/smoother. Same would go vs K550, Bosshifi B8, etc.
To me the 400i definitely sounds a tad bit brighter than it sounds warmer. It's
somewhat close to neutral, but imho, definitely bright leaning.
(starting around here:
https://www.head-fi.org/f/threads/hifiman-he-400i-impressions-and-discussion.698974/page-816, and to continue the discussion.. heh)
And related to the other: I don't think the soundstage is the issue at play here, it should have the vice versa effect on the bass, and perhaps its relative position matters more; if its further back, and unnaturally wide: the bass doesn't have the same impact/feel if the soundstage is narrow and closer to you/in your head. Think about where you would stand/sit related to the orchesta/band, and what kind of a venue/placement it'd be.
I thought the Q701 had more bass for the first weeks I had the 400i, as it was my first planar, and it took my brain to accommodate mainly on how the sound is being generated. The so-called brain burn in on the technical side, (not to mention how it takes a while for your brain to accommodate and get accustomed to the wholly different FR), is quite a task for your brain. The airwaves no longer comes from a directed small cone to your ear: but from a larger vibrating plane. My suggestion to actually get past this brain burn in, is listen to them, and nothing else for a couple of weeks.
I don't think this really applies with headphones as you really don't have a forward/backward soundstage in headphones like you do speakers... With headphones for me it's really mainly inside your head and left/right, with sometimes sounds seeming to come from top or the back, but for me at least, the sound coming from the front really doesn't work for my ears/brain, which is why I had some trouble adjusting to headphones at first. Basically nothing in front, just in your head...
So yeah for me, for the bass balance, front/rear simply does not apply, and I really have to go with SPL; bass vs mids vs treble.. And in those terms, there's just
no way you can say the 400i doesn't have a bit more mids/treble than bass...
I thought the Q701 had more bass for the first weeks I had the 400i, as it was my first planar, and it took my brain to accommodate mainly on how the sound is being generated. The so-called brain burn in on the technical side, (not to mention how it takes a while for your brain to accommodate and get accustomed to the wholly different FR), is quite a task for your brain. The airwaves no longer comes from a directed small cone to your ear: but from a larger vibrating plane. My suggestion to actually get past this brain burn in, is listen to them, and nothing else for a couple of weeks.
Additionally, the thing with dynamics drivers, (excluding the latest tech) in general: as they technically cannot push out the sub-bass, there's a hump in the mid-bass accentuating our perception of the bass. It's basically always there, in its relation to the sub-bass roll off, the amount just differs depending on the can.
So... Do you just ignore this bass 'boost' and claim dynamic headphones don't have more bass? That would go against logic; like a woman with a D cups and a woman with B cups, and then you'd be claiming that they have the same size breasts because the woman with D cups has implants and that just augments her breast size... Well yeah...! That's the point!
If it's highly pronounced, it's probably viewed as a 'basshead' can, and it does indeed "its job" for the most genres where people crave for bass. It doesn't mean that it recreates the bass technically well or accurately, and certainly doesn't work for all the genres. I could point you out to some IDM goodness - basically I can't even listen to most of the EDM stuff, as the sub-bass is either wholly forgotten; most likely due to production issues, as the texture there might be hard to hear, or haven't been heard at all whilst producing the track - works well if you can't hear the flaws.
Well, to state the obvious, there's also the
amount of bass; some headphones have just more pronounced bass/mids/treble, and in absolute terms, imho, the 400i has a brighter sound than Q701... hehe, I don't know going back and forth, when there's more mids/highs, and the highs are much more pronounced compared to the bass, I have to say it's brighter!
Again, I've had the 400i on my head for a good 45m, currently listening to Pink Floyd's Any Colour you like, this track definitely doesn't have a bright sound in any sort of way, it's really more of a mid/bass reverby/dark sound, definitely no inherently bright/harsh sound to it, and the overall 'vibe' of the song is definitely not in the 'bright' range, definitely what I'd describe as a 'dark' overall sound... And again, by putting on the Q701, instantly, the sound takes on a darker character; the warm sounding reverb is made more present and enveloping, and the guitar and all just gets pushed a little bit more into that 'dark' sound... Going back to 400i; everything sounds 'brighter', the dark enveloping reverb sound 'shrinks', the guitar gets more present, and the sound presentation
clearly takes on a brighter/more lively presentation.
And again, there's a difference on how the driver creates the bass, dynamic drivers have this snappier thump/kick which the planars do not have. It's been covered here before, the description varies: but it's related on how the air is being moved from a technical standpoint. Depending on the description, you might even assume that planars lack the bass impact/slam; it's not the case, it's just generated differently, and its feel overall differs. I've described my LCD-X for example having face-melting qualities in that department.
Yeah I definitely wouldn't say the 400i lack impact. My main issue is that to get the same 'weight', or bass slam, as you do on the Q701, the 400i has to be on a much louder volume, and then the mids/highs are just again so much louder. Which again translates to brighter sound. Ex: Pink Floyd's Eclipse on Q701, at the start of the track, the drums are much more pronounced than the synth & guitar, and the dark reverb sound is
very significant. Going to the 400i, the cymbals instantly become a lot more evident, so is the synth + guitars, and the dark reverb/echo sound has definitely 'shrunk' overall, sound became less dark, even the vocals are more present, the sound has definitely taken a brighter character.
So if you're going back and forth between 400i & Q701, to me this is clear as day and simply isn't even in the debatable category, that the 400i sound brighter! Not really to the Grado extent or whatnot, but to me someone who says they sound 'bright' is definitely more correct than someone who would say that they sound warm/dark...
So yeah, for me at least, bright songs definitely gets me reaching for the Q701 to tame the harshness/brightness... But YMMV!