Astell & Kern has built its reputation on premium portable audio, and the Clarus represents the brand’s latest attempt to bring that philosophy to a flagship in-ear monitor. With a sophisticated tribrid driver system, custom accessories, and a distinctly professional design, the Clarus enters a highly competitive segment filled with ambitious audiophile IEMs. Does its sound quality justify its high-end positioning? Let’s examine its build, comfort, soundstage, and tuning to find out.
What You Get
- Clarus Earbud L/R
- AK × Effect Audio Cable (custom-spec Ares S Lite; 0.78 mm 2-pin)
- AK × AZLA SE2000 Ear Tips — 6 sizes (SS / S / MS / M / ML / L)
- IEM Pouch
- Cable Holder
- Clarus Saffiano Leather Case x1
Look & Feel
Astell & Kern products always look great, especially their IEM collaborations with other brands. With the Clarus, A&K has crafted an IEM shell that is stylistically in line with their high-end DAPs without being very flashy. The Clarus has A&K’s logo and ridge pattern, but the shell is a plain design that has a purely professional appearance.
This is still a pretty big shell, though, but when you actually pick it up for the first time, you’ll be surprised by how light it is. For this price, I kind of wanted it to have a bit of weight to it, especially with how hollow it feels. It gives a better impression of durability, but it’s also less practical when it comes to long-term comfort. You can definitely feel that when worn, as the weightlessness of the shell significantly impacts the fit quality in a positive way. The shell is big, but the Clarus never feels cumbersome. It stays firm in your ear with good support from the nozzle and its good selection of tips.
Design
The Clarus uses a nine-driver tribrid configuration consisting of one proprietary 9mm dynamic driver, seven Sonion balanced-armature drivers, and one silicon MEMS tweeter. Its low-frequency system combines the dynamic driver with two balanced armatures, while three balanced armatures handle the midrange. The remaining two balanced armatures work alongside the MEMS tweeter to reproduce the high frequencies. A proprietary six-way crossover coordinates each driver group to maintain phase accuracy, tonal continuity, and detail across the 20Hz–20kHz frequency range.
Soundstage
After hearing some of Astell and Kern’s previous collaborations, I was expecting the Clarus to fall more in line with the brand’s usual reference presentation. That’s exactly what you get with the Clarus, as its soundstage reproduces a wide but mostly linear sonic environment. It was consistently flat but had a natural scale that allows the instruments to show dimension across the stereo field still. It sits on the edge of an open headspace, mainly sticking to an interior feel, but the spacing lets the Clarus communicate an organized sound field with strict positioning. Instruments are separated extremely well, making the imaging feel precise with cohesively stacked layers that give you a clear display of the frequency spectrum without compromise.
Low End
I never equate the Astell and Kern brand to a bass-heavy sound, so the Clarus is quite fitting for their catalog. If a scaled-back, neutral timbre isn’t the kind of bass you’re looking for, then the Clarus probably won’t interest you, but it’s perfectly fine for a reference sound signature. You get the slightest thump off the edge of the mid-bass, but other than that, the Clarus has minimal tonality to really sink into. Nothing about the lows is egregiously undefined, though. In fact, the Clarus has some resolving frequency content and detail retrieval that gives the bass a sense of weight and physicality. Kick drums and bass grooves appear tight and concise, with even some finesse thanks to quick transients. You get a sense of its ability, but Astell & Kern opts to tune the Clarus in a way that reserves these qualities.
Mids
It’s obvious to me that an Astell and Kern IEM would favor the midrange, but I’m still impressed with its resposne here. Everything is pushed forward, with elements like vocals sitting right in front of your face. The mids feel like a burst of energy, but the Clarus keeps it all incredibly articulate, allowing strings to glide, clean guitar plucks to buzz and twang, and voices to appear life-like.
Accuracy is its most impressive quality, as the Clarus feels like a true monitor with the purest detail. It’s like you’re spectating a mix in a small studio, as the mids still feel linear, but the way the Clarus individualizes instruments in their respective positions compensates quite well for this. One last note about the mids: the vocals are pretty spectacular. Voices are crisp, down to enunciation. They dominate the frequency response and are overall extremely vivid for both male and female voices.
Highs
The Clarus isn’t afraid to be a bit shouty and sibilant in some areas, but the highs still express a good sense of control. It does this while still being very resonant and colorful, with shimmery cymbals, bells, and tambourines. Everything contains a sparkly glint, which is immensely satisfying. This is a rich high end that never appears too bright or fatiguing. Even when the treble gets quite hot, the Clarus reproduces a confidently natural high-frequency timbre that is as expressive as it is refined in its tuning. It’s definitely some of the best treble I’ve heard on a pair of IEMs recently.
Summary
The Astell & Kern Clarus is an impressively detailed IEM built around clarity, precision, and midrange accuracy. Its wide, orderly soundstage and excellent separation give instruments a firm position in the mix, while the vivid vocals and expressive treble make the presentation feel immediate and revealing. The restrained bass response will not satisfy listeners looking for warmth or heavy impact, and the occasional upper-frequency sharpness may be noticeable on certain recordings. However, those who prefer a neutral, monitor-like sound with exceptional articulation will find a lot to appreciate. The Clarus ultimately feels best suited to critical listeners who value transparency, lifelike vocals, and refined high-frequency detail over an overtly musical or bass-forward presentation.
The Astell & Kern Clarus is available at Audio46.
