Tonality9
Build7.5
Matchability8.5
Value For Money9
8.5
Our Score

Leave it to Audeze to once again transform the landscape of Audiophilia. Hard to believe that just a few years ago, we all dreamed of Planar portables. Now a reality with the Sine on-ear and now the iSINE inner-ear series, we’ve not much to dream about anymore.

For a first run of technology into the portable Planar universe of headphones, Audeze has laid the foundation for what I am sure is a barrage of fantastic portables to come in our near future.

The Design

Eye Catching

Well, you either love it or hate it. Audeze’s design of the iSINE 20 will certainly turn heads and shift eyes in your direction when spotted, I think that much is vividly clear. I can’t say the design is lacking in appearance because I think I am in the minority here and feel it is very attractive. It does what it was intended with its intense and eye catching appeal.

Visual Cues

In my travels, I’ve not been asked about a product so often when out and about. So many questions about what the hell that is inside my ear, which leads to conversations about Hifi audio nearly every time someone inquires. The odd choice of a web looking design intended, at least I think, to recapture the visual cues of Audeze’s older LCD-series was admirable and well done. It screams Audeze and pretty much all Audiophiles can spot it a mile away.

Connectors

They’ve chosen the same angle used for connectors as found in the older LCD-series as well, which I do not think have ever been used inside an IEM design before anywhere that I can recall. It works well for the most part.

I think I’d not prefer that slightly forward angle to the entry way to the IEM housing itself, as the cable has some bunching up issues now and then, especially when I ride my electric scooter and the cable insists on adhering itself to a place on my chest that I am not fond of. Normal down style IEM cables do not have this problem.

The Design “works”

But, I digress. It is not felt nor even a minor issue when walking or sitting so I won’t take points off just because the wind forces the cable to bunch up when using a mode of transportation hardly anyone else uses. Either way, Audeze paired with Designworks (A BMW Group Company) for all of the implementation of this model. I think their work paid off, this one made waves in the community before the product was ever heard by anyone. All it took was a prototype image release to the audio community and the rest was history.

An Important Tech Quote

“Miniaturizing Planar drivers is no small feat. The new iSINE Series barely weighs 20 grams, contains all our exclusive patented technology including power enhancing Fluxor Magnets that nearly double the magnetic driving force on our large, ultra-thin diaphragms with patented Uniforce voice-coil technology that delivers the most accurate in-ear headphones experience ever. The distortion (THD) is less the 0.1% overall even at high volumes, an amazing achievement for in-ear headphone designs.” -Audeze

Sound Impressions

The Bass Quantity

Oh come now, this is why you came here to read this. We all know it, don’t deny that! Audeze is known for bass, what more needs to be said? In this case, the miniaturizing of a Planar driver has worked well for the case of quality, which is stellar, but quantity is a bit of an issue for anyone seeking excellent depth. Truth be told, this is a very smooth sounding IEM down below that has good depth and quantity, but not enough to satisfy the inner bass head in me. Does that even matter? Nah, not really. Most listeners will enjoy it a lot, I am sure.

The problem I am having is entirely subjective: I expected a load of bass depth and quantity response on certain tracks but received something more tame, matured and elegant. That is a wonderful thing most of the time and for most track listening experiences, but considering it is a Planar IEM, one would naturally think the physical quantity is potent.

Such is not the case. This iSINE 20 has good bass quantity, certainly not objectively lacking at all, at least not in my opinion. I may have expected something that the current Planar market simply doesn’t have anymore. IE: Planar’s with a lot of bass. It seems we’ve moved out of that field and into something more advanced, intellectual, smooth and forgiving.

The Bass Quality

Truly, Audeze has achieved marvelous quality in the bass regions and I haven’t the slightest negative comment, objective or even subjective, to toss into this review regarding it. Nope, not a single “even slightly negative” comment or thought crossed my mind from the first day I received it, to penning this review.

In terms of raw, physical quality, this iSINE 20 is sublime and sounds very similar to the way the LCD-3 Fazor portrays bass. Smooth, pure, lacking harsh impact and a pleasure to listen to at all times. These are qualities that I’ve desired in my on the go experience since I converted to Audiophiliaism.

My goodness, I truly do not have any other IEM’s currently and officially on the market to compare to the level of quality and purity these iSINE 20’s offer. What’s more, they sound the same on my Cowon Plenue M as they do with my higher end home desktop DAC and Amp combo. Stunning, to say the very least. If you want bass purity on the highest level for an IEM, this is for you.

Outside of the most expensive Custom CIEM’s that I’ve experienced, this is surely the only standard, non-custom IEM that houses purity on this level. The gap to the next best is significant, at least in my opinion.

Mids

Oh, my. This is certainly an Audeze product! Gentle warmth, highly musical, but also absurdly clean. This, to me at least, feels again just like the LCD-3 in miniature form. I hate to make that comparison, but swapping between them as fast as I can and through many A/B comparison sessions and I’ve come away feeling that the midrange and bass experience of the iSINE 20 and the LCD-3 are pretty similar in setup.

They are forward, but not overly so. They are rich and detailed, but not clinical or sharp, yet also house an audible level of musicality and slight warmth factor (a bloom effect, soft edges, easy to listen to indefinitely) that I find highly desirable. No, this iSINE20 isn’t on the level of Audeze’s full-size models in terms of quality, but for an IEM, I think it is certainly top shelf material.

Vocal Density

Well formed, dense feeling mids make the vocal experience highly enjoyable regardless of the genre of the track and I feel like that is a very difficult quality in audio to get right. Quality itself seems much easier to obtain than an experience that is hefty, as well as clean. In my opinion, it takes a finely tuned, specific intent by the designer to produce a hefty sounding Dynamic driver headphone.

With that in mind, only a few sets out there have really produced a Planar Magnetic-ish type of a sound in a Dynamic driver, such as the Focal Elear, for example. Getting that substance factor on a Dynamics are so vividly rare, that I cannot really list more than a few sets in existence that do it well. 99.99% of all IEM’s are Dynamic driver coils, but now, we’ve something else on the table in the first.: REAL Planar Magnetic IEM’s.

A New Hope

This is the start of a revolution, at least in my opinion. Hopefully, other companies will follow suit and discontinue Dynamic driver designs in IEM’s, now that Planar Tech has been proven to be a viable option. I hope that doesn’t upset others, that is entirely subjective.

Sure, Dynamic drivers can achieve levels of quality on par with this iSINE 20, some have come close, but I think it is clear that the future of audio is Planar enabled and not Dynamic or Electrostatic in design. That is important to note because that heft to the presentation is of a higher degree than commonly found in Dynamic drivers, Planar’s simply do it better. This iSINE 20 has excellent substance and density factor in the vocal experience…but, I do have a little problem with it.

Upper Mids

I’ve found the upper midrange to be just a bit nasal. Subjectively, I can’t mark points off because I know this is the first attempt at this type of an IEM. Planar IEM’s are a new thing and to get it perfect on the first try is just an impossibility. But, they’ve still done admirably. Yes, I do think there is a little bit of an oddity sometimes when the track is highly energized with artists.

Sometimes, there is a little bit of a blur and blending of upper mids and treble, which I am not fond of. But once again, not a serious problem and one that I found to pop up rarely in my music experiences. So rare, in fact, that I can attribute it nominally to track quality and garbage mixing on tracks I might have thought were decently recorded.

Slight Smearing

Personally, I think it is a little of both: just a little nasalness and smearing of the line between the uppermost mids and lower treble, but also made a little worse by tracks that are prone to lots of singers belting tunes at once, or a highly energized track in general.

By that, I mean fast paced tracks with a lot going on (untypical of 99% of most musical listening experiences one has) that combine to form shoulder shrug-worthy upper mids. It isn’t a problem, but it is evident enough to cause a fuss with me when this or that track appears in my Playlist that houses this type of a messy recording, with too much going on, to differentiate what and where the vocalist placement is on the track.

The best example I can come up with is the group called Pentatonix, who insist on beat boxing and having 5 other vocalists all shouting at the same time. With tracks like that, some detail gets lost.

Treble

Relaxed

I’d not call this a weak link in the chain, per say. I would call it leaving a bit to be desired. As the bass and midrange of this product is setup, so too does the treble follow a very good sense of smoothness, offering fatigue free listening experiences. But, as with most very smooth sounding headphones, they tend not to express abundantly sparkled or highly responsive treble.

Clean & Clear

What is there is very clean and clear, easily one of the best treble experiences in terms of raw clarity I’ve yet heard for an IEM. But, also what I consider overly reserved in quantity. Don’t expect Noble or Hifiman HE-6 type of treble, do expect Audeze LCD style treble: a bit dry, lacking brightness and interesting texture.

Substance Factor

The allotted treble is still very good in quality, no doubt. But as mentioned, quantity is an issue sometimes and I do find myself boosting the treble to achieve more substance. Sadly, no middle tier Planar in the full-size arena has achieved excellent treble outside of ye’ old Hifiman HE-500. So, I do not berate the iSINE 20 IEM for not achieving excellent treble as well. But, I stress: what is there, is very good and just shy of something I would consider excellent.

If it had more substance and quantity potential, all without sounding harsh or painful and retaining the stock smoothness factor, I’d score it higher for sure. This will certainly be tweaked in future models, undoubtedly. I suspect all Audeze’s future Planar IEM’s will be more well rounded from top to bottom. Here though and on the iSINE 20, the treble experience is smooth and tame, a bit too reserved and requiring a small boost up top to really create an even and smooth signature from the bass up to the top treble area.

Staging

Outside of very high-end custom IEM’s, I’ve not heard a soundstage as well formed and vividly spacious. Everything is into the excellent tier, of height to width, depth of field to the separation of instruments and sound in general. Yes, this IEM does sound staging very well. A natural presentation is so rare in IEM’s, especially so in Planar products. Yet, Audeze managed to get past that hurdle and fashion a very spacious sounding Planar IEM.

If you had asked me if this were likely to even be a thing at this time in 2015, I’d have raised an eyebrow and said this tech is far off, but very likely. Audeze hastened this faster than I thought they would, which is great news for future products. They started off excellent and got over the bump in the road of the lacking staging properties in Planar headphones. Despite being an IEM, I really don’t care because now we can say there is an excellent Planar soundstage available: the iSINE 20.

Dynamics

Physical slam factor is a non-issue and I consider this one of the smoother sounding IEM’s I’ve experienced with regard to bass and treble slam. Not The Smoothest, but certainly one of them.

Smooth Sounding

I have a pet peeve that revolves around wincing and shoulder shrugging, blinking and jerking my head back when headphones exhibit harsh slam in a physical manner. I really can’t stand that and for the sake of the audio track and being accurate to it, I can’t call the iSINE 20 accurate in that sense. It smooths most of the spectrum out for you and makes pretty much everything enjoyable, dimming the slam factor I know to be abundantly evident and ever-present on certain tracks I usually test with for this quality.

Musical

Is it boring and overly smooth? Absolutely not, this is an Audeze product and it still packs a little punch. I’d call it subjectively well engaging and middle ground in that respect in terms of how much slam and kick is allotted. It definitely subdues my very harsh tracks, so note that if you are after a clinical appeal in your dynamics, this isn’t the IEM for you. If you are after a relatively fatigue free experience, I’d recommend you drop the cash for this and enjoy.

Our Verdict

Audeze once again proves it is at the forefront of modern audio and has paved the first portable Planar highway for everyone else to abide by. They seem to have played this one safe with the treble experience: neither offering too much or too little, not too much in the way of dynamics and not boring in terms of engagement factor in a physical sense.

Sure, the design is wonky, but damned if they are not supremely comfortable when using the ear hook guides included in the package. Sometimes, I forget they are even in my ear. I often go for rides on my electric scooter while wearing them, winding down paths and enjoying without realizing I am wearing them.

I find it amazing that the nozzle placement, the IEM tip itself that goes into your ear canal, is so perfectly placed that it balances out the larger housing above it when used with the ear hook guides. It is quite a stellar IEM in almost every regard. From clarity to comfort, I don’t have much in the way that is negative to say on an objective level.

Subjectively, I wish they had implemented more treble quantity and perhaps more bass depth, or at the very least made sure to allow for better EQ response on the low end. I find myself managing a +6dB boost on the bass end and still wanting more as a bass head, as the bass does not alter as much as I would prefer when EQ’ed.

Beyond that, I expect…no, I demand Audeze continue onward with Planar IEM’s and portable Planar’s in general. They’ve proven now twice in a row that they are leading the pack in this Portable Planar game. I expect nothing but greatness from them in their future models.

Technical Specifications

Style In-ear, universal fit
Transducer type Planar magnetic, semi-open
Magnetic structure Fluxor
Magnet type High-grade neodymium
Diaphragm type Ultra-thin Uniforce
Transducer size 30mm
Maximum power handling 3W
Maximum SPL >120dB
Frequency response 10Hz – 50kHz
THD <0.1% @ 100dB
Impedance 24 ohms
Cable type non-microphonic
Dimension 31mm x 35mm
Weight 20g without cable

9 Responses

  1. Beautiful Blessings

    I was given a demo of these yesterday and was blown away.
    Okay, they were being fed from a Mojo and some top notch wireless stuff but the result was stunning.
    Don’t you hate it when someone gives you an audition on something and it reveals the…er…shortcomings of one’s current kit…? Grrrrr…

    Reply
    • 24bit

      I found that it doesn’t matter much about the source, they sound very similar for the most part through nice dacs as they do through my cowon plenue M for example. Great iems.

      Reply
  2. Techno Kid

    I think Focal with the Elear and Utopia proved that dynamic drivers are still a worthy option for headphones. Planars are great but dynamic drivers aren’t going anywhere anytime soon imo.

    Reply
    • 24bit

      The Elear and Utopia aren’t a typical Dynamic design though. The dome of the Elear and Utopia are rigid and hard as a board, where as most other dynamics have a thin film that flaps in the breeze. I cannot name a single dynamic iem that shares that type of design and likely micro-izing that type of a design into a tiny housing is years off in tech potential. I would think minaturizing that tech for a dynamic dome film into an iem would be so costly and time consuming, that Planars would be the wiser way to go because they tend to sound that way naturally, where as you need mass R&D to get a dynamic driver to sound similar in substance factor.

      Reply
  3. SSergey22

    Hi. Thanks for the review! I know these IEMs leak sound (obviously) but I am trying to understand if they are suitable for public transport/office use. What’s your opinion? Are they too distracting for other people?

    Reply
    • 24bit

      Surprisingly, they don’t leak much. I think the sound product by public transports, like a Bus, will overpower the sound leaked out of the iSine and nobody on that bus will hear it. Leakage is not an issue unless your office is very quiet. It is audible at 10ft away that someone is listening to something, but you can’t make out what it is and it is very faint. I wouldn’t consider this at all an issue and would absolutely recommend this to office workers. I love taking these out with me and being able to hear things around me better than usual due to the open back design. But the answer is no, I wouldn’t worry unless:

      1. Your office is super quiet
      2. Someone is sitting next to you, very close, also in a quiet area.

      Reply
      • SSergey22

        Thanks for a detailed reply! Will give them a try.

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