TAS Commitment
Description
EarAcoustic STA-Hi End Series IEM – Redefining Audiophile Performance
Engineered for Audiophile Precision and Power
Introducing the EarAcoustic STA-Hi End Series IEM, where state-of-the-art acoustic engineering meets unmatched musical detail. Designed for audiophiles and sound professionals, the STA series features a dual-core dynamic driver system with Tesla-grade magnetic coils that deliver exceptional power and control across the full frequency spectrum.
A four-unit bilateral driver configuration—powered by N50+N50 magnetic tech—creates breathtaking resolution, dynamic clarity, and a wide soundstage. Experience deep, controlled bass from the 10mm large dynamic coil, and extended highs through a 6mm micro driver, delivering an immersive sound signature from 10Hz to 30kHz.
STA-Hi End – Ultra-Fast and Natural Transient Sound
The STA-Hi End model features a dual-diaphragm design, combining a 10mm beryllium-plated diaphragm and a 6mm polymer composite diaphragm. With an elastic modulus of approximately 300 GPa, the beryllium plating ensures superior transient response, fast signal recovery, and natural tonal balance. Whether it's jazz, classical, or EDM, the STA-Hi End responds with remarkable agility and precision.
STA-Hi End MAX – Durability Meets Sonic Excellence
For even greater resilience and performance, the STA-Hi End MAX upgrades to a 10mm DLC (diamond-like carbon) diaphragm, paired with the same 6mm polymer composite diaphragm. With a higher modulus of around 400 GPa, the DLC driver delivers ultra-fast signal response, reduced distortion, and smoother frequency transitions—ideal for high-resolution tracks and demanding mixes.
Acoustic Tuning That Merges Science with Emotion
Each unit is the result of hundreds of simulation experiments, resulting in a precision-engineered acoustic cavity optimized for resonance and warmth. The target frequency response curve is designed to reproduce music as the artist intended—with rich emotional depth and minimal distortion.
Key Acoustic Specs:
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THD < 0.5% for pure, accurate tonality
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Sensitivity > 110 dB/mW for effortless drive from any source
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Intermodulation distortion < 0.05% for clean, consistent audio
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Transient response < 3ms ensures snappy and clear transients
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Low-frequency rebound ≈ 50ms gives depth and presence to bass
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Signal attenuation < 0.5dB maintains clarity across the range
Craftsmanship Meets Durability
Aesthetically refined with a premium electroplated ABS resin cavity and a zinc alloy frame, the STA series features a metal-coated resin process for a glossy, high-end finish. It’s built not only to sound good but to look stunning and last long.
High-Fidelity Interchangeable Cable System
Each STA model includes a detachable high-definition audio cable made from oxygen-free copper and copper-plated silver. With a soft texture, tangle-free design, and up to 408 strand cores, this cable ensures stable, detailed, and high-resolution transmission. The 0.78mm dual-pin connector and 2.5mm single wire diameter offer durability and easy upgrades.
Why Choose the EarAcoustic STA-Hi End Series?
Whether you’re a critical listener, studio producer, or an audiophile seeking the perfect balance of power, precision, and warmth—the STA-Hi End and STA-Hi End MAX deliver it all. Backed by meticulous design, cutting-edge materials, and premium finishing, the STA Series is a masterpiece of in-ear monitor innovation.
Our Review
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Very quick and satisfying deliveries along with a wide range of products
Absolutely loved the soundstage and neutral bright tuning of this iem.
Best IEM for beginners. It helps to know what music taste matches to you.
These are great, every element of a song is well balanced. However, that balance is a double-edged sword, as it lacks bass. So, if you're looking for a strong base signature, you might want to choose something else or use an equalizer, which is what i'm doing.
This is a solid cable, which delivers stunning sound. I use this cable to connect my Hifiman EF400 to Fiio K15. This is a major upgrade to the sound (as compared to the two standalone).
I bought Cadenza as my first IEMs, before buying these I researched a lot about every kind in this budget I could go for, I streched and bought these as something which sounds, harmonious, smooth and comfortable for long sessions, even then the details and the sound still puts me in awe beating any earbuds and in ear sound system I have ever tried.
One of the best IEM.
EarAcoustic STA-Hi End Series IEM is too warmform me which is my sound signature. Beryllium driver tuned so fantastic. When was received this never go off from my ears to 4 hrs. I have so many brands and so many chifi IEMs used but this EarAcoustic STA-Hi End Series IEM is totally blowned me away. That's why this EarAcoustic STA-Hi End Series IEM is highly recommended. Thanks once againMr Pritam Ji for suggesting me so wonderful IEM in audio library collection.
The product came with all the accessories it should have, the box wasn't damaged at all and delivery was quick. It only took 2 days to be delivered and came with good enough packaging.
Overall, Very satisfied by theaudiostore. While this was my first time buying from them, It definitely won't be the last.
When I was a kid, somewhere around 2005–2007, I was gifted a Sony cassette Walkman. I was too young to care about model numbers or sound signatures. I just knew that pressing play felt important. That Walkman is gone now. Probably sacrificed to the great black hole where old chargers, socks, and childhood joy go to die. But the want never left.
So years later, I did what any emotionally stable adult does. I bought a Walkman again. This time, the Sony NW-A306. And no, this is not nostalgia cosplay. This is something else.
-> A Small Device With Strong Opinions:
The NW-A306 looks like a cute mini smartphone that went on a digital detox retreat. No camera. No speaker. No SIM. No “bro just one notification”. It exists only for music and has zero interest in your productivity apps or reels.
Physically, it feels solid and intentional. Buttons still exist. Sony clearly assumes you might listen to music without staring at a screen like it owes you money.
-> Android, But With Discipline:
It runs Android 14 and yes, streaming apps work. YouTube, YouTube Music, Spotify, Apple Music, Tidal, ... etc all fine. But here’s the thing, you can choose how modern you want it to be.
With Google services running, I casually listened for about 6 to 7 hours and still stayed under 60 percent battery usage. That’s respectable. Disable Google services and background nonsense, and suddenly the battery life becomes “arre yeh toh chale hi ja raha hai” level good.
Sony didn’t brute-force anything. This device feels tuned, not overpowered.
-> Sound - Sony Being Sony:
Let’s clear this upfront. Walkman is the legacy on which the iPod later thrived. Apple polished the idea. Sony invented the feeling.
And yes, it is Sony, so bass exists. No question about that.
The bass here is not the shaadi DJ type that enters before the song does. It is controlled, confident, and supportive. With KZ ZAS and Sony XM4s, the sound is clean, warm when needed, detailed when it matters, and never tiring.
As a USB DAC, this thing is frankly ridiculous for its size. Plug it into a PC and it behaves like a serious audio device pretending to be small for fun. Stable, clean, no tantrums.
This is not five-minute wow sound. This is “ab bas ek album aur” sound.
-> Local Music and the Joy of Making Things Difficult:
Now comes the part streaming apps will not like.
Yes, we have everything. Spotify, Apple Music, Tidal, Amazon, Qobuz, YouTube. Music is everywhere. And somehow, nothing sticks.
Algorithms keep suggesting. You keep skipping. Half the time you don’t even remember what you listened to two hours ago. Music becomes vibe. Background. White noise with feelings.
Owning music changes behaviour.
Ripping CDs into FLAC, fixing metadata, web scraping album art, organizing albums. This is effort. And effort creates attention. You listen to albums. You read lyrics. You notice production. You sit still.
Sony Music Center on Windows actually helps instead of testing your patience. Metadata, album art, even 12-tone analysis. Organizing music feels intentional, not like punishment for liking files.
The NW-A306 makes music feel yours. Not rented. Not borrowed. Yours.
Ironically, it uses modern tech to make things slightly complicated on purpose, so listening becomes simple again.
-> So Why Does This Exist?
The NW-A306 is not trying to replace your phone. It is reminding you why music once deserved its own device.
It is focused. It is disciplined. It does not beg for attention. And that is rare now.
If you treat music as something to truly listen to and not just something playing while you scroll, this Walkman makes complete sense. Emotionally. Practically. Logically.
Also, it feels really good to own your music again. Like, irrationally good.
Some loops are worth closing.
i was scared what if i will get scammed, or will the put stone in the box ,
but nothing happened like that, best unboxing experience, do take video, as its mentioned in the package either,
product 10/10
the only issue the extra included case has no guide how to put earbuds in it and as i am an idiot i inserted it wrong took 45 minutes reinserted, fites to tight,
if you are stuck just like me - [****] email me i will help,
best audio , ANC is decent, call good, battery decent, overall excellent package, didnt find in ear detection, or find my earbuds only thing which arnt deal breakers
Amazing product and quick delivery.
There is no hissing sound with Kefine Klean iem
It's really a good beginner iem who qre comes into the iem first time
From perspective the wide bore tips were very flat in term of eq, normal bore and silicon tips performanced the best
