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Hifiman IEM's: RE-400 and RE-600

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  1. mobbaddict
    I only see the RE400 and RE300 referenced in the Hifiman website, does it mean they stopped the other higher end lines? I tried a few high end (>$1000) universal iems from other brands a couple years ago and honestly i don't think there is a huge technical difference with the multi BA models. For me something balanced and accurate like the RE400 is all i need for enjoying music while commuting. Then at home i can enjoy full-size headphones.
    Last edited: Oct 24, 2019
    jafnvaegi and G_T_J like this.
  2. G_T_J
    I'm not sure if they discontinued the other models but what I'm sure is that Hifiman has hit the spot with these 2.
    I hope they will keep producing them for the years to come as they are thoroughly excellent, comfortable, small and (now) very affordable too - both models.

    I'm also one of those that don't get the fuss about multi-driver iems with huge shells that protrude from one's ears...
    In my book nothing can beat a finely tuned dynamic driver plus for desktop and home there's always the logical option of using full-sized over ears.
    jafnvaegi and mobbaddict like this.
  3. mobbaddict
    One thing i noticed also is how different they sound depending on if you wear them with the cable oriented upward or downward. I think this is due to the small hole next to the cable, which might create reverbs. I think they sound better with the cable downward as they suddenly have more body in the bass-low midrange (a benefit of the reverbs), versus the thinner sound signature with the cable upward. It actually makes a big difference if you ask me. Unfortunately it's not very easy to wear them downward while you're on the move. I tried to find official pictures from Hifiman with people actually wearing them but couldn't find any. It would be interesting to have your feedbacks on this.
    Last edited: Nov 13, 2019
  4. castleofargh Contributor
    here is what I get when reducing or closing the vent:
    when placing anything near the vent without directly reducing the size of the hole, I got no impact on the response. and I also checked waterfalls in case of some delayed stuff, nothing worth showing came from it. you'd have to create a second acoustic chamber outside the vent while also pretty much sealing that chamber(beside the vent itself) to start getting another resonance worth something at the eardrum. because otherwise, remember that even if the ear does reflect some frequency more than others(it probably does), that signal now has to go back into the IEM or through the tip before reaching the eardrum and make an audible difference. chances are that such signal would be a good deal lower in amplitude compared to what the direct sound from the driver generates at the eardrum. so just intuitively, I wouldn't bet on that idea for making the noticeable difference you're feeling.

    now I use the miniDSP E.A.R.S that has a fake ear so I can just try what you explain instead of pretending to simulate it like a nerd and probably missing something. measured with the cable above the ear or down(while maintaining about the same insertion depth), I get basically the same result twice:
    so that doesn't seem to explain why you're getting a difference.

    the third hypothesis would simply be that when you use it with the cable over the ear, you don't get the same insertion depth, angle, or the same quality of seal.

    now I fly away like a captain.
    jafnvaegi and mobbaddict like this.
  5. mobbaddict
    Wow, thank you for making all these measurements! I love it when science meets audiophilia. You're right, it doesn't make much sense that this little vent would make such a big effect on sound... I also thought of the third hypothesis, which is very plausible. Fourth hypothesis would be my brain playing tricks on me... Oh well, we'll never know. But thank you again for trying :beerchug:
    jafnvaegi and castleofargh like this.
  6. ilmothedude
    I seem to get better sound from my RE400 when I wear them cable up. It not different tonality really, but more open soundstage, like soundstage gets more clear sense of depth and imaging. I guess it has something to do with my ear canal shape or direction, so iem would be in slightly 'better' angle when worn cable up. I don't know, but I mostly prefer using my iems cable up anyway since fit is more secure and less microphonic, so it's fine that it sounds better that way.
    mobbaddict likes this.
  7. musiclife
    Quick bump here, I lost my RE600 recently and have been using the RE400, which are still IMO the best neutral sound for money, but I do miss the extra clarity and bass of the RE600.

    Before ordering them again, anybody else finally found alternatives? I just cant seem to encounter anything this is as smooth, neutral and non-fatiguing than the RE line
  8. mobbaddict
    Before buying the RE400 I was eying the Stagediver SD2 which is apparently dead flat in the bass/midrange and slightly rolled off in the treble. Based on the descriptions it might be an upgrade thanks to the deeper bass and faster balanced armature sound. Ljoker compared them in his review:

    On the other hand the timbre of the RE400 is absolutely outstanding and can put +$1000 multi BA iems to shame...
    Last edited: Dec 29, 2019
  9. mobbaddict
    I agree with your description, the RE400 do sound clearer with the cable up. For me it's better the other way around since I like the meatier sound signature. But practically speaking the fit is indeed much more secure with the cable up.
  10. musiclife
    I think the RE600 is even better than the RE400, especially at a price of 65-75$ !

    But, I can find the RE800 silver for 200$.... would it be the same upgrade?
  11. mobbaddict
    Having just bought a pair of HD600, I can confirm what was said during the latest pages of the thread: the resemblance with the RE400 (with the single black tips) is striking. I think Sennheiser themselves wouldn't have done a better job of replicating the sound signature of the HD600 into an iem (never heard their own iems though). The HD600 might be a little more laid-back even. I would definitely recommend both to any beginner audiophiles (and I think you could totally live with both of them and terminate your head-fi account without any second thoughts).
    jafnvaegi likes this.
  12. H T T
    The Final Audio E series complement Hifiman’s RE 400 and 600. I prefer the E2000 over the RE 400. The RE 600 is pretty much my ideal tuning for an IEM.
    jafnvaegi and B9Scrambler like this.
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