Hifiman Sundara Open-Back Planar Magnetic Headphones - Official Thread

Sundara has 58mm and yes male ears are that big and they grow for about 1cm later. Seems i have small ears. Luckily.

Since the headband is Made of Steel i simply bent it a bit and the clamping force was gone. Mostly.

Maybe it is that small because they measured chinese ears. Could be. Chinese XXL T-Shirts are usually more Like l for me

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Hello !
I am new here :slight_smile: (I have sundara since a month)
New Sundara
Capture d’écran 2022-07-28 à 10.49.22



I’m quite curious to see how the closed-back Sundara performs. If it’s anything like it’s open-back brother, I imagine it will have a warm reception in the headphone community.


Ah, shoot! How’s a guy to get out of this hobby if irresistible stuff like this new closed-back keep dropping every few months?


Happy Cake Day @InvisibleInk.


Pretty disappointed by the Mojo 2 + Sundara combo. I figured it would be enough power based on specs and reviews and while the Mojo 2 can make the Sundara plenty loud, it sounds like a lot transient detail is getting lost, dynamics are lame, and soundstage is relatively small. Mojo 2 into desktop amps* (even just a Schiit Heresy) is a significant step up in sound quality.

Comparing the Mojo 2 to other high-end DACs, the Mojo 2 is practically indistinguishable so I think it’s a great DAC - but I was hoping for a simple all-in-one battery powered solution for using Sundaras away from my studio.



I purchased a backup pair for the studio / for attended mix sessions and I’m happy to report that the 2022 Sundara I received (directly from HiFiMan) sounds more or less identical to the 2020 Sundara I purchased two years ago. The pads on the 2022 Sundara are actually a little more comfortable than the replacement pads I have on my 2020 pair which I also got directly from HiFiMan - I remember the original 2020 pads being more comfortable than the replacement pads too so maybe replacement pads are just a little different? Who knows.

INTERESTINGLY the 2022 Sundara is slightly more efficient than the 2020 Sundara. I was hoping to use the Mojo 2’s dual outputs to listen with my partner but we noticed that the new pair was always about two or three clicks louder than the old pair. I confirmed using another dac/amp that the new 2022 Sundara was a little louder all other things equal.


I’ve had my Sundara’s (2021) now for a few months, and I am blown away by the sound quality. It just sounds so rich and accurate.

I’ve been pairing the Sundara with the FiiO e10k, and have been happy with the volume levels the little dacp/amp can produce on both my PC and phone. I’ve been looking at the Topping DX3 pro+ as un upgrade to the e10k. I know the dx3 pro+ is a much more feature rich desktop amp, but how much of an upgrade would this be sound quality wise (soundstage, tonal quality, resolution, etc)?

The e10k already gets loud enough, so purely for the amp part I feel the dx3 pro+ would not be necessary. That leaves the DAC part, where the better chip and DSP could make the sound better.

Does anyone know if the HiFiman Sundara will be upgraded to the Stealth drivers soon?

what a beautifully written review, every part of it so coherent to read! I wonder if you gave the Sundara a try in the studio and if you would consider it for that purpose at all. Would you say it’s neutral/analytical enough for production work?

I’m with you on the Sundara. In spite of all the love it gets, I also found it too treble forward and hot for my ears. Mine gets 0 usage time, I should probably just sell it.

I’ve moved on to other headphones in any case though… Rosson RAD-0 is my current planar love :+1: :smile:

Just posting some new measurements from the B&K 5128



For those unaware, there’s an air gap between the driver and the housing on the Sundara, which gives it a subtle bass boost compared to other open-back planars. The tradeoff is that you lose sub-bass at 20hz due to the dropoff below the resonance frequency (Fs).

When sealing up the driver gap but putty (Funtak here in Canada), it drops the bass boost and provides extension all the way down. I don’t recommend doing this, since perceptually it’ll sound like there’s more bass if you just leave it open. But it is the explanation and conclusion to the curious case of the Sundara’s missing sub-bass below 30hz.