The new HarmonicDyne Zeus with beryllium drivers

I’m very excited to hear about this new headphone. One i cant wait to hear. I and many others purchased the HarmonicDyne’s (A ThieAudio company) first headphone the Helios. It turned out to be one of my favorite headphones with its speaker like presentation, soundstage and tone. I love the the detail it has for a 180$ headphone. Its a very lively headphone. It left me very impressed with HarmonicDyne. So now they’ve releases the HarmonicDyne Zeus. They seemed to have gone all out on this headphone which retails for 350$ It has 50mm beryllium drivers. It comes with a OCC cable and very nice case. BGGAR did a unboxing of it here:

I bought one off Amazon and i’ll update this post with my impressions:


This feels like chi-fi versions where they took focal driver material and rad-o pads and grill. It feels like nicer looking version of what monoprice does.

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i’m hoping it will be super detailed lol

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i should be getting a review demo sometime in the near future.


Awesome! can you let me know when your review is up?

This is confusing. I thought antpage was antdroid. Two ants.


I was first :stuck_out_tongue_winking_eye:

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Antpage is my name. Anthony Page


Guys i just got the HarmonicDyne Zeus delivered a few days ago. been listening to it. This is shockingly one of the best headphones i have ever heard. and i have a lot of headphones. The Bass is the best. great treble, awesome soundstage and speaker like presentation. and above all very nice detail. They said their using Beryllium drivers and you can definitely hear it! this is such a rousing and jumping sound. balanced and natural, and exciting! At first i was worried paying 350$ for it but its worth every penny. The ear pads are BIG about 2.75". Nicest case ive ever gotten with a headphone. has a handle. Very nice cable but unfortunately SE not Balanced. This headphone is making me very happy, i’m saying “Wow” a lot,i havent done that with a headphone in a while.


Photos? Would love to see more.

The HarmonicDyne Zeus and Helios side by side:


Gorgeous. And the case and box?

Now this is one where Aesthetics count. Fortunately they perform well too per @Antpage . Looks like a win.

Mark Gosdin

The HarmonicDyne Zeus is a new product from Linsoul house brand HarmonicDyne. Their previous product was the warm-bodied Helios. I was not a big fan of the Helios, and felt that while it had a pleasant tuning, it lacked quality resolution, dynamics, and felt a little too forward and missing depth and imaging capabilities. The Zeus shares a lot of similarities to the Helios, at least on the surface, and comes in at $350, which is nearly double the price of the previous release. This review will take a look at the Zeus and see how it stacks up.

The Zeus was sent to me from Linsoul for review. It’s available from their site directly at

Build & Accessories

This headphone comes in a large and very well-built custom case that is something I’ve seen come with headphones like ZMF and Audeze. It’s a large Pelican or Seahorse style locking case with metal and plastic exterior and foam cut-outs on the inside to fit the headphone and accessories. This was a bit of a surprise but a nice touch.

The cable that comes with this headphone features standard dual 3.5mm connectors to the headphone and terminates in 3.5mm stereo jack. While the overall look of the cable looks well-built and sturdy, it’s a pain in the arse to actually use. I’ve seen my fair share of bad cables, and this ranks up there with some of my least favorites because of how heavy, bulky, and stiff it is. I guess when you think about it, the competition here is in nice company – Focal, Hifiman, Audeze, and others. They all make rather crappy cables for such premium and nice-sounding products.

The headphone style is almost exactly like the Helios. They share the same headband and cups, with the only difference in the CNC design on the metal plate on each cup. While there aren’t any real rough edges on the faceplate, it can feel a little edgy. There also seems to be a bit of heft to this and the amount of metal on the headphone gives it a more premium feel, but it does feel weighty at times. I’ve also banged the headphone on my noggin’ once taking it off as the cup sprung out and hit me and it hurt actually!

Anyway, the Zeus features new internals however. This time they advertise the driver as a 50mm beryllium dynamic driver. It doesn’t state if its a Be-coated driver like the ZMF Verite or if its a full Be driver like the Focal Utopia. From looking at the actual inside, it does look like some sort of metal film on the diaphragm, but I didn’t take it apart any further to get a better look.

Sound Impressions

The first impression I had with this was, “hey, this isn’t that bad at all!” The Zeus doesn’t have the forward and in your face sound style that I felt with the Helios. While it still is more on the intimate side of things, there’s adequate instrument separation, and staging, and that’s important to me. The other thing I quickly noticed was that the little details were more discernable that what I remembered on the Helios, and it actually has a decent amount of resolution in general.

The Zeus is still a warm-bodied headphone, with a raised low-end and recessed mid-range and treble that can occasionally be a little metallic and sharp, but in general, I find it pretty pleasing to listen to and I feel its much more on the “romantic” side of sound signatures than it is with the neutral reference sound. Much more.

My immediate headphone listening just prior to the Zeus was spent with a lot of time using the Koss KPH30i, through endless video conferences and quick listening of music in-between meetings, so perhaps my initial impressions were a tad skewed – comparing and going from at $25 on-ear headphone to a $350 over-ear one.

Since this headphone claims to use beryllium drivers, I pulled out my ZMF Verite and did some quick A-B comparisons on a few tracks. It was quickly apparent that the Verite had a supreme advantage on technical performance and its signature midrange timbre. In fact, I noticed how recessed the mid-range was on the Zeus – especially when it comes to the presentation of female vocals – when I did a back-to-back comparison of the two. This is an area where I already felt the Verite hid some vocals a little further back already, but the Zeus pushes it even further away.

But let’s be fair, this is a headphone that is 10 times the cost of the Zeus, and so the Zeus is really in competition with headphones more like the Sennheiser HD600, Hifiman Sundara, and the Fostex TH610/Emu Teak-type headphones which are the ones I think define this price point. And in that regard, I think the Zeus is a small step behind still, but not as far behind as I would have imagined coming in.

It may out-perform the Foster-based headphones in resolution, and it beats the legendary HD600 in bass performance, and while it doesn’t top the Sundara in resolution, or a flat and resolving bass-response, I do think people with a warmer preference may enjoy the Zeus more, though take into account that all of these headphones still have much more natural mid-range tonality and that’s important to a lot of people.

I especially liked watching movies with the Zeus. It’s open back, but has a bass emphasis and also a treble rise that creates some sort of V-ish shape sound signature that works well for action movies and shows. I found myself grabbing the Zeus when putting on The Mandalorian the past three weeks of this awesome Season 2, and enjoyed the action scenes in full quality. Pew! Pew!


The Zeus actually sounds good and passable, which is something I don’t think I’ll say a lot for a Chi-fi brand headphone outside of Hifiman. But, it is something I hope to say more of in the future. While I don’t know if this is my headphone of choice overall in this price range, I do think it has some qualities that make it deserving of the price point as a full package.

I am not a fan of the way it looks, but I appreciate the build quality of it all and the removable generic connectors make it easy to swap out cables. The case is fantastic, and generally it’s a good package overall.

I haven’t had a chance to experiment with pad swapping or other mods, but it’s something I plan on doing in the future, and I’ll make a write-up on my findings as I go, so stay tuned for that!


Good review thanks. This is still my favorite headphone and the thing that surprises me the most is the odd presentation. like the Helios which i also loved it could be forward yet still have this large sound. that large sound i dont think i can call soundstage since its so forward, so what do you call it? I love that big lively sound. and it seemed to me to give it really good separation. what do you think?

Well, that’s something.

After my disastrous experiences with the Thieaudio Phantom and the Sivga Phoenix in terms of sound, comfort and processing problems, I keep my fingers off these ChiFi headphones.

Since it is an incredibly time-consuming process to restore these parts AND you can’t hear them for a test anywhere outside of China, I will keep my hands off them in the future.

Especially since there are significantly higher quality headphones on the market for the prices quoted.

In-Ears is another chapter where quality is now a little more common.


I found the phoenix improved by the leather pads. its not as dark after.

If you remove some filter material with the phantom their pretty good. especially if you do the other mods with them.

It is very nice that you are satisfied with these headphones, so you shouldn’t feel bothered by my opinion on these cans :+1:.

1.) I have hat size xxl or 63/64 in Europe, these headphones are much too small, even with the headband fully off, they only cover 2/3 of my ear.

2.) Even if I can get them to fit somewhat, due to the size of the ear pads they are at least on-ear and not over-ears.

3.) Can I get the following headphones here in Germany, all of them cheaper and with sometimes much better sound settings:

The Sennheiser’s HD560S, HD600, 6xx …
The Beyer’s DT880 Edition 600 Ohm, TYGR300R …
The AKG’s K-701, K-712 pro …

As long as I have this selection, I will always prefer the headphones mentioned above to a (admittedly good-looking) € 260 China cracker that is difficult to fit on Western European heads, with an, at best average sound quality, in MY opinion.

Believe me, I’ve spent an incredible amount of time “pimping” these headphones.

Foam out, several ear pads thoroughly tested, the metal grill removed, the protective film removed, parts reinstalled, various amplifiers thoroughly tested.

All without a satisfactory result.

In addition, there is this extremely poor processing quality.
The whole headphone feels wobbly and occasionally the ear cups fall out of the holder.

Sorry, but for 360 €, not my thing.

PS.: I kept the cable :wink:

Especially since I have the Hifiman 's: Sundara, Deva, HE-400i …
get significantly cheaper.

And an Audeze LCD-1 is only marginally more expensive here in germany.

All of these earphones are much better processed and sound “tonally correct”.

Don’t be mad, but that’s how I see it :pray:.


Ah i see. I love Chi-fi stuff so i’m always buying that stuff. They are truely doing some awsome stuff these days. like this headphone here. Even DMS seemed to like it lol:

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Just adding my two cents to this.

Here are the measurements done on the GRAS:

I’ve also done some minor EQ tweaks to it, and found it was actually really easy to do. This headphone’s default tuning isn’t that great with a somewhat bloated upper bass and lower midrange, but the rest of it is pretty close to being great. Additionally, the detail and technical performance is very competitive at the price point - and importantly for comfort it’s also fantastic.

My EQ here is mostly optional, with the only real requirement being the adjustments to the lower mids and upper bass.

  • 21hz Pk +3 Q=1.41
  • 60hz Low Shelf +2
  • 100hz Pk -1.5 Q=2
  • 180hz Pk -3 Q=1.41
  • 333hz Pk -3 Q=1.41
  • 750hz Pk -1 Q=1.64
  • 1400hz Pk +2.5 Q=1.5
  • 4200hz Pk +4 Q=2
  • 7750hz Pk -2 Q=3
  • 11000hz Pk +3 Q=3

Here’s how it measures after EQ.

Here’s the review.