Pros:
Good value for under $50 USD
- Dual dynamic drivers (10mm Beryllium + 6mm PET) offer organic sound
- Strong bass performance—ideal for bassheads and “old school” tuning fans
- Wide soundstage with immersive 3D layering
- Natural and musical presentation across bass, mids, and treble
- Beautiful, well-built stock cable (OFC silver-plated, low tangle)
- Comfortable fit with lightweight resin shells and 6mm nozzles
- Good build quality with metallic/acrylic faceplates and venting
- Easy to drive with most devices (32Ω impedance, 110 dB sensitivity)
Cons:
- Bass can verge on bloated at high volumes
- Male vocals slightly recessed
- Treble can feel dark on sibilant mixes
- Imaging and separation are decent but not standout
- No included pouch or case in the package
- Slight midrange veiling due to bass bleed
- Limited tip variety (only one type of silicone tips included)
- No strong technical emphasis—more musical than analytical
Hi to you all!
First of all, a shoutout to Anna from KeepHifi, thanks to them for giving me this set for my honest and sincere review. The impressions and opinions are on my own, with the only bias in place being my own musical and tuning tastes.
The EarAcoustic Audio STA-K is the new IEM by EarAcoustics Audio in alliance with KeepHifi, with a MSRP of 49 USD and you can get it at KeepHifi official store, in their EarAcoustic Audio official store at Aliexpress and in other retailers online.
The STA-K is driven by a 10 mm Beryllium-coated + 6 mm PET Dynamic Drivers who delivers a mix between an old school vibe but with no other details put aside, with plenty of bass potency, so musical and organic experience into Hi-Fi, without breaking the bank.
TDLR; A mix between a bassy “old school”, but airy and extended tuning with an organic sound presentation who delivers a more than interesting experience.
The STA-K comes in a nice box, in which the front image shows the EarAcoustic Audio logo and model. My unit come with the cable with a 3.5 mm singled ended plug and the same 0.78 mm 2 pin connection, there's an usb-c + mic cable version available costing a few dollars more.
The STA-K has a good impedance and sensitivity to be easily driven with plenty of devices, its beryllium-coated DD puts the word Bass in your head, sometimes feeling too much, and it comes with the PET goodness of a stiff diaphragm to delivering an organic sound with a well-rounded extension into the bass and treble who puts it at a Basshead’s choice, but also to “old school” tuning lovers and newcomers to the hobby.
Its package comes:
Personally, I like the stock cable, is beautiful, matches very good the IEMs, well-built, doesn’t tangle easily and looks with quality, I don’t feel the need to change it. The included eartips are more than enough for it, I’m using it with the M size ones for the test. I would like maybe as in another time I has the experience of trying an EarAcoustic Audio IEM, the STA Hi End Max, an inclusion of a pouch or a case to complementing an enough package for its price.
The IEMs themselves has a well-built and quality resin material with those aluminum faceplates in which you can see a little vent who complements the well vented and dampened front of the drivers, providing that wide soundstage and extension into the bass and treble without missing details. The IEMs are pretty lightweight, its nozzle is not big and with its 6 mm of diameter provides a nice fit into average sized ears with zero fatigue for long sessions.
How’s the sound of the STA-K?:
The STA-K is bassy, with enough sub-bass and mid-bass who extents into the low frequencies, is fast, boomy and thumpy, sometimes at high volumes it’s at the verge of bloated, its qualities extends and bleeds enough into the lower mids providing a naturalness into the male vocals and bass kick veiling slightly the mids, songs like Gone Hollywood by Supertramp and Child of Vision by Supertramp, from the legendary Breakfast in America, the bass is shown clean, organic, fast enough, with a good decay, shows that extension and enjoyable presentation, distinguishing the bass guitar details. (RIP Rick Davies).
The mids in the STA-K are an interesting part in it, with enjoyable presence, noteweight and cleanness, male vocals are a bit recessed but well presented, with zero shouting nor thin, female vocals are forwarded and not sibilant, the instruments in this region of the frequencies are nice presented, songs like Garbage by Twenty One Pilots and Cartagena by Pendulum shows how the instruments used in the track, vocals, are nicely presented, handling nicely as well the sibilance, and you are gladfully lost in the music, music or video games you are playing.
The treble is well extended, also got that organic and natural presentation who is shown in an immersive listening, but sometimes tends felt dark with tracks with a sibilant mix like milk of the madonna by Deftones and Albatross by Thrice, most of the time you have to be nitpicking to feel it like that.
Technically capable enough, with a wide soundstage but not so much width, its focus is not into the imaging, but it got enough of it, same with the sound separation, offering a delightful 3d layering and with that an immersive experience to use in music, videos and movies watching, and video games. With songs like Thing We Tell Ourselves in the Dark by Between the Buried and Me all those details are present, and it not sounds congested, the guitars and drums sounds with enough micro and macrodetail presentation.
So, is the EarAcoustic Audio STA-K worth buying? (And why it is a 3.5/5 to me):
In my opinion, it is worth trying for those who like a bassy, old school and natural with an organic presentation of sound in an IEM with a slightly relaxed sound. At a price of less than 50 USD, it offers great value for what you receive, standing strong among its competitors with a well-rounded package, including a high-quality, visually appealing cable, the STA-K provides a delightful introduction to the world of Hi-Fi.
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