Dunu Zen Pro iem Review - fuck me these are good

Discussion in 'IEMs and Portable Gear' started by rhythmdevils, Nov 23, 2021 at 5:55 AM.

  1. Baten

    Baten Friend

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    God damn it good write-up. I don't strictly need these.. do I.. I guess I could get away with the excuse of getting them for Christmas/New Year :confused:
     
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  2. rhythmdevils

    rhythmdevils Best SBAF member of all time

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    If you don’t think this is the best evar iem illl post a video of myself dancing naked wearing the LCD-4
     
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  3. rhythmdevils

    rhythmdevils Best SBAF member of all time

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    If anyone sees any Black Friday deals on these please post!
     
  4. jaker782

    jaker782 Facebook Friend

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  5. Merrick

    Merrick A lidless ear

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    I got an email from Dunu saying the Zen Pro would be $749 on Black Friday.
     
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  6. Michael Kelly

    Michael Kelly MOT: Pi 2 Design

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    Totally self serving question - was the PI2AES used to drive the Yggdrasill? :D
     
  7. rhythmdevils

    rhythmdevils Best SBAF member of all time

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    Always! I love that little box!
     
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  8. roshambo123

    roshambo123 Friend

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    Could you define Asian taste FR? Specifically does Asian mean Japanese market? How does that differ from American and EU FR preferences?
     
  9. purr1n

    purr1n Super Friend

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  10. rhythmdevils

    rhythmdevils Best SBAF member of all time

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    I've been listening to the Zen Pro constantly since writing this, and it has yet to ever exhibit harshness in the upper mids or treble, even when paired with the upward tilting FR of the Shanling M6 Pro which is a bit bright and lean sounding DAP.

    That's a sign of true neutrality. When you can add a colored piece of gear upstream and it stays neutral sounding, because the headphone has got wiggle room. When a headphone has problem spots already, there is no room to push it any further and colored upstream gear will make the headphones problematic.

    I am also still constantly impressed by its resolving ability, and stand by everything I wrote in this review.
     
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  11. Augmentin

    Augmentin MOT - DUNU IEM Company

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    Just wanted to clarify a few things in the blurb @rhythmdevils reposted about the driver's development. The following is a very simplified diagram of a cutaway of a ZEN / ZEN PRO driver.

    [​IMG]
    1. Mg/Al alloy dome -- From a profile view, the 'W' of the dome can be seen. This was the biggest process challenge to be overcome during the development process. When we were developing the LUNA, we wanted to implement this shape of dome, but the Be kept cracking during the forming process at the crease where the voice coil was meant to attach (point 3). Thus, the LUNA remained a rounded dome design. ZEN succeeded in having a dome that didn't crack, but it was thicker than we desired. ZEN PRO's dome is thinner/lighter overall because of changes in the alloy composition. It retains its stiffness. The t-aC DLC coating was thickened in order to reinforce strength and reduce the probability of failure. Even though these changes seem modest, they contributed to most of the cost increase because of how much they involved dramatic changes in the manufacturing process.
    2. Polyurethane-based soft surround -- It is essentially the same across the ZEN and ZEN PRO. It is designed such that it contributes negligibly to the sound response, and doesn't introduce any additional bending/rocking modes into the driver.
    3. Voice coil -- It is also the same between the ZEN and ZEN PRO, same coil windings, wire thickness, and length, hence the same sensitivity/impedance. What is different is the air gap dimensions.
    4. External 'ring-type' magnet -- While it is typical for speakers to use an external magnet design, most earphones and small headphones use an 'internal' magnet schema for packaging reasons. The external design allows us to increase sensitivity even with such a big dome, but more specifically allows us to subtly modulate the response character of the driver even in the absence of acoustic damping. The 'lift' to the 400-800 Hz region of the frequency response is a direct consequence of tweaks to the air gap. Changes to the air gap alter the uniformity and maximum intensity of the magnetic field across the voice coil.
     
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  12. Claud

    Claud Living the ORFAS dream

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    Ordered one from Chinese vendor, then saw it on Amazon. Same price. Kicked myself. Will probably arrive in January.
     
  13. Cellist88

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    You can get it at headphones.com for the same price. Tempted to cancel and order locally
     

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