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Oriolus Traillii JP New Generation Electrostatic Hybrid IEM

Oriolus Traillii JP New Generation Electrostatic Hybrid IEM

$ 5,999.00

Please feel free to contact info@musicteck.com for current offers

Oriolus Traillii JP

Oriolus Traillii JP - MusicTeckOriolus Traillii JP - MusicTeck

New Generation Electrostatic In-Ear Earphones With 12 Drivers Each Channel.

The Traillii JP is the flagship in-ear earphone from Oriolus. It has a 3-way design equipped with 4 latest-gen Sonion electrostatic drivers and 8 balanced armature 3-way drivers.

With 10 years of tuning experience from leading Japanese manufacturers, the Traillii JP is designed to deliver invincible, superb sound quality and performance, regardless of material costs. Upon Oriolus’ uncompromised standard, the Traillii JP is characterized by the ultimate and balance performance in the treble, midrange, and bass, a smooth and natural voice, and extremely high resolution, with a wide sound field, high density, and rich detail as heard in over-ear headphones.


  • Mixed 12 driver each channel, including 4 latest-gen Sonion electrostatic drivers and 8 balanced armature drivers.
  • Customizable handcrafted cavity with German-made resin for panel personalization.
  • Equipped with customized cable tuned for the Traillii based on PW Audio 1960s.
  • Equipped with the Pentaconn 4.4mm balanced headphone jack from Japan.
  • Exclusive multifunctional earphone storage case and cable reel in collaboration with VanNuys (Japan).


Body Material: Photopolymer

Transducer Type (per CH):  Electrostatic Driver*4; BA Driver*8

Sensitivity: 112dB/mW

Freq. Response: 20Hz40kHz

Impedance: 21Ω

Cord: Pure Audio Grade Copper (PWaudio)

Plug Type: 4.4mm Balanced

Accessories :

Silicone Eartips (S M L 2-flange-M)
Foam Eartips (S M)
Protect Case (Vannuys)
Round Twintube (Vannuys)

Customize your Traillii by selecting a faceplate and shell from the options below. Please contact info@musicteck.com for questions or inquiries.

Note: A customized Traillii will take around an additional 1.5 to 2 months.

Oriolus Traillii JP New Generation Electrostatic Hybrid IEM
Oriolus Traillii JP New Generation Electrostatic Hybrid IEM
Oriolus Traillii JP New Generation Electrostatic Hybrid IEM


Customer Reviews

Based on 8 reviews
Absolutely stunning - worth the cost if you care about detail

I’ve been drooling over these for some time now and recently decided to pull the trigger...and I’m glad I did. I cannot believe the depth and sound stage that these deliver. They hardly sound like a typical IEM - the quality is on par with a high end set of cans (which I suppose makes sense given the price). Own a pair of Utopias and the sound stage on the Trailliis competes with ease. The bass is powerful and they have a very detailed, balanced sound to them. I’ve paired these with two DAPs so far: the Astell & Kern SE200 and the Lotoo Paw Gold Touch Titanium Edition. I prefer the sound signature of the LPTG Ti plus it doesn’t require an adapter (the Traillii come with a 4.4mm balanced plug).

Aesthetics: The packaging is simple - no frills. I love the design of the Traillii but some may find it simple compared to other similarly priced IEMs (like the Vision Ears Erlkonig). To put it simply, you pay for quality, and the Trailliis deliver.

These are end-game quality IEMs. They are expensive though. If you have the cash and want the best, this is it.

Best of Best!!!

It is one of the most expensive earphones.

However, earphone performance is also one of the best!

And thank you Andrew for helping me with the purchase!!!

Nothing comes close

I've used a ton of IEMs - u12t, lcdi4, Andromeda 2020, Z1R.. and the list goes on and on. Nothing is even in the vicinity of this IEM. The engagement is top notch, I can listen to these all day. Comfort is outstanding. The soundstaging and instrument separation are unreal, I can hear every little detail in my music now!

They're so easy to drive - I can use an iphone dongle or my paw s1 for more than enough juice. They sound great even out of such low power sources. When I want to feel fancy I plug them into my WM1Z (and sometimes Shanling M8) and lay down and listen to music for HOURS. I never want to take them off.

Fun fact, I also use them for FPS gaming, they are great for hearing even the faintest footsteps and identifying the direction they came from :)

One of The Top Two IEM's Ever Made - Part 2


And this went on an on. Each one terrific and outclassing every other IEM I have heard. In my view, not the Ely, Thummim, VE-8, VX, Fourte, Layla, Khan, etc. compare. In summary, and this is only in comparison to each other, the Erlkonig has a little more note weight, a bit more bass power and slightly warmer upper mids/treble while the Traillii is a bit brighter overall with a touch tighter bass. If absolutely forced to pick a favorite, I might pick the Erlkonig, but in reality, they are right on top of each other and I keep changing my mind. I just kept feeling this throughout every comparison. So much so, that I just sat back and listened, and stopped taking notes. My advice would be to someone looking to own an Erlkonig that cannot get one, just get the Traillii if you have the means. If you already own the Erlk, I personally would not get rid of one for the other, but instead get both if you have the bank. While many of us have a bit different taste overall, I highly doubt anyone could dislike the Traillii, so audition one if possible, but you may be doing so at great cost.

As far as the packaging, it stinks. But you know what, I have yet to use any manufacturer’s included case above my Dignis cases, and I typically have to change the cable where here I would not. So even though the packaging is nowhere near what VE or Dunu provide, it is the sound that counts. The cable is a bit microphonic though. Nothing over the top terrible, but that seems to be a characteristic of PW’s 1950’s and 1960’s cables. Aside from that they are great cables.

And for me, here is the kicker. The darn thing is more comfortable with the sedna tips than the Erlk. My Erlk fits great, but the Traillii’s fit is even better and one of, if not the most comfortable fit including my customs. I have placed my order with MusicTeck! (by the way, Andrew is great to work with and very customer focused).

I might write this up and more as a full review, not sure, but hopefully this is helpful to those wishing to consider the Traillii. As of February, 2021, I consider it one of the top two IEM’s ever made, Enjoy!

One of The Top Two IEM's Ever Made

A Brief Synopsis

I initially received the Traillii for an audition. I first listened to it with the included ear tips and was not overly impressed. I could tell this was an excellent IEM, but it was no threat to the Erlkonig. However, when I put on the Azla SednaEarFitLight Short tips, they were a perfect fit for my ears and the fun began. I started listening and comparing using some EDM and some of the tracks @Rockwell has been recommending on the VE thread for the Elysium (thanks Rock!). I found the Traillii to have a slightly smoother upper midrange and treble (very close) and much more bass than the Ely. The Traillii provided this bass impact without impacting the mids and treble in any negative way. As I was listening, I found the Traillii to be involving me more into the music than the Elysium. The Erlkonig proved to have a fuller bass and a slightly softer yet extended treble.

On “Can’t Stop Running” by Adam Ben Ezra, a track that is literally in the wheelhouse of the Elysium, the Traillii provided more bass on each note, and all of the detail just as clear. The Erlkonig provided a fuller sounding bass with the hand hits very clear and sounding great! The Traillii’s bass, though a touch less powerful, was just a tiny bit tighter. The Ely with its less bass heavy presentation was great, but each bass note was missing the power portrayed by both the Traillii and Erlkonig. In my notes I wrote: “is the Traillii and Ely with bass?” I think it is and a few others on head-fi have mentioned this. I would agree. The mids are not an advantage for the Ely vs the Traillii.

I am not a big soundstage person, but I am interested in instrument and vocalist placement. Both the Erlk and Traillii are excellent in this regard. The Traillii has a wide soundstage and as Alex (@Twister6) has already stated, it is pretty much like that of the Ely. I would agree. I am positive no one will be upset by its soundstage.

I then moved on to some well recorded rock albums. What I quickly found was that the Erlkonig and Traillii were in a class of their own. On “Brothers in Arms,” with its wider range of sound and dynamics, the Elysium could not keep up. Its presentation was just too light, and it had the incorrect timbre (in comparison). The same was true for all kinds of reasons for the VE-8, VX, Layla, Luna, Fourte, etc. As soon as I switched to one of them, it was easy to see they were no competition for the Erlk and Traillii. I just wanted to put them back in my ears. I even tried listening to the other IEM’s first, getting adjusted to their sound, to give them any advantage possible (including volume at times). However, as soon as I listened again to the Traillii, it was night and day. I tried this with a few more albums, both rock and jazz, and then stopped. It was abundantly clear the Traillii and Erlk both sounded better than everything else I could throw at them.

Listening to “Brothers In Arms,” the Traillii had a bit brighter presentation than the Erlk but still smooth, great timbre and bass. The vocals come across as they should. The Erlk was also excellent. It was a touch darker than the Traillii, but also had excellent timbre and bass. The vocals are excellent. I might like the Traillii’s rendition a bit better here. As the bass on this album (though a great recording) could be a bit better, the little bit of extra tightness on the Traillii along with its slightly brighter presentation gives it a slight advantage. A battle for sure though.

Listening to “Graceland” The Erlkonig had a touch of darkness which smooths out the tracks and overall provides a better sound to my ears. However, the Traillii is right there, though on some tracks I did have to lower the volume as it is just a touch brighter and more open and that did not always work the best on this album. And quite often it was a toss-up. Overall, on this album I give the edge to the Erlkonig, but awfully close.

On “Abraxas,” the Erlkonig sounded best. The heavier note weight provided a more intense listen. Traillii was excellent, but Erlk had the edge. It also seemed a bit smoother on some vocals which played better on this album.

On L.A. Woman, the Traillii sounded best. It sounded a little more open and added a touch of brightness to the vocals which played well. Both sound great though, and the details in this recording all come through letting you easily hear the driving rhythms.

On some jazz albums by Chick Corea they were both terrific. If I made my home 2-channel system neutral, then the Erlkonig is a little darker than neutral (which makes sense as I have previously described the Erlkonig as neutral leaning Romantic in any deviation from neutral), while the Traillii is a touch brighter than neutral. And it is terrific.

And this went on an on. Each one terrific and outclassing every other IEM I have heard. In my view, not the Ely, T...

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