• Jan 29, 2026
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EarAcoustic Audio VSA-V1: A Dynamic Driver Can Do A Lot If You Know How to Tune It Well.


Pros

An IEM with a musical and engaging sound.
More coherent sound than the SPA High End.
Signature sound. Contrasting, dynamic, and full-bodied.
With fun music, "this is a party" with presence in the bass, midrange, and treble. No frequencies are drowned out.
Expressive and romantic midrange. One of the best for its price.
Its highs are smoother and less harsh at high volumes.
Solid technical performance, especially at the macro level.
Kilobuck's IEM look.
Solid and complete unboxing.

Cons

It loses some of that more visceral and aggressive sound of the high-end SPA (sometimes I even appreciate it).
The height of the Z axis of the stage could be improved somewhat.
It is not as versatile as other IEMs in uses beyond music and multimedia.

INTRO

Welcome to another review.
Are you looking for a beautiful, affordable IEM with a fun musical sound? Well, maybe you'll like this review.
Today we're going to look at the EarAcoustic VSA v1. Another model from this brand that, so far, is doing very well. Or at least it seems that way to me, since it offers a reasonable price with a really good overall experience. A few weeks ago, I also reviewed the SPA High-End model, so I'll compare them from time to time so you can draw your own conclusions.
Since I like to write clear, direct, and to-the-point reviews, I won't go on any longer, so let's get to it.

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UNBOXING

Once again, this brand is committed to offering a very, very good unboxing experience. I know of many brands that, despite their products being more expensive, have fewer accessories and a feeling of lower overall quality.
It's an unboxing experience similar to that of the SPA High-End, but somewhat better.
We have a cable that is similar to the SPA model, but this one has the peculiarity of being modular. 4.4mm and 3.5mm. Both included in their case. Personally, I've used the 3.5mm connector because I felt it was more than enough with the amplifier I used. In case anyone's wondering, I've used several, but I've tended to use the ifi Hip DAC v3 more for sheer convenience and ease of use. The white cable itself feels strong and of very good quality, made with a pure copper base. It has a Leeds-type coaxial cluster structure core, made of silver-plated oxygen-free copper, composed of 408 fine wires.
Then we have a very nice pink carrying case. I like these cases because they're round, which usually makes them easier to store in bags or suitcases. It's neither too small nor too big. Plus, it's rigid. It will protect the product very well from bumps and falls.

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In a narrow cardboard box, we have silicone tips of different sizes and branded papers. I used the medium-sized tips.
So yes, we have a quality, well-presented unboxing that, honestly, I think is worthy of a much more expensive product. I wish all brands offered this as standard. Yes, the best thing is the IEM. How beautiful it looks! That shiny silver finish, with those rhomboid shapes on the casing... it looks elegant. That's the feeling you get. An elegant IEM. It should be noted that it weighs somewhat more than its sibling, the high-end SPA, because the cavity is made of metal. The fit seems optimal and without any problems. It's not one of those deep-insertion IEMs like the ThieAudio Hype 4, KiwiEars Astral, etc., nor one of those with a very light and more shallow insertion like the Meze Alba, Ikko Oh5, or even the 7hz Timeless II.
I won't go on any longer. Let's get to what's of interest to you all.

GENERAL SOUND

The EarAcoustic VSA-V1 is an in-ear designed with the clear intention of offering a rich, corporeal sound experience geared toward musical enjoyment rather than the millimetric dissection of audio. Just like its predecessor, the SPA. From the first moment, it conveys a feeling of warmth and closeness, with a signature in which the bass and midrange carry the weight of reproduction. Before discussing the purely technical sound, let's provide a little context, as this will help make it easier to understand.
In the development philosophy of the EarAcoustic VSA-V1, the brand uses the term "female toxicity" or "female poison" as an acoustic metaphor to describe certain timbral traits present in recordings of female voices—especially in Asian registers—that combine beauty and aggression: a "nonlinear tremor" in the high overtones and an "emotional pressure" in the midrange density that, if left uncontrolled, can be tiring or harsh. The VSA-V1, under the slogan "the ultimate toxicity hunter," seeks to capture the purity and expressiveness of these voices by eliminating that harshness, thanks to the use of a titanium diaphragm, a powerful Tesla magnetic field, and meticulous tuning of the frequency response to balance detail, smoothness, power, and realism.
Does this sound familiar to you about a Tesla magnetic field?
In an IEM or earphone, a stronger magnetic field means the coil and diaphragm respond more quickly and accurately to the electrical signal, improving aspects such as:
• Diaphragm control, reducing unwanted distortion.
• Faster transient response, with sharper attacks.
• Efficiency: less power is needed to drive the driver.
Beyerdynamic popularized the term "Tesla driver" in the over-ear headphone industry. But anyway, back to the IEM itself. Now, let's define its overall sound. I'll give you three words: Contrasting, powerful, full-bodied.

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The bass is rich and authoritative, with a sub-bass that provides a perceptible physical punch and a mid-bass that adds body and density to the whole.
The texture is somewhat rounded, with a moderate decay, giving it a more musical than strictly technical character. This bass presence favors genres such as pop, electronica, rock, and R&B, where the rhythmic foundation becomes a fundamental element. The transition between bass and midrange is smooth, without an abrupt cutoff, which helps vocals sound integrated into the mix rather than isolated. It's not a basshead, but it's one of those IEMs that's relatively close, and it will likely appeal to many people looking for that signature in their headphones.
In the midrange, the VSA-V1 stands out for its warmth and fullness. Vocals have body and a natural timbre, avoiding overexposure that could be fatiguing. This is especially noticeable in female and male performances in the mid-range, where the IEM offers a richly textured and well-articulated representation. Acoustic instruments also benefit from this character, as the midrange provides a pleasant color that softens attacks without detracting from the clarity. It's not a profile designed for maximum neutrality or absolute transparency, but rather for maintaining a coherent and homogeneous musicality across the spectrum. Finally, we have a profile with more body than the models from Ziigaat, Kiwi Ears, and others. Like the SPA line, these mids are enjoyable and tend to shine a bit more on female voices, although, to be honest, I also like this VSA for male voices.
In the high end, the treble fulfills its role of providing air and definition, but without overpowering the rest. Unlike the SPA high end, which could easily fall into sibilance, this one is somewhat more controlled. It has good transient management that avoids both harshness and excessive brightness. This allows for long listening sessions without ear fatigue, something that, combined with the overall warmth, makes it a very easy IEM to use for hours. However, at medium-high or high volumes, this IEM, due to its more intense character, can be tiring and overpowering if you listen to it for hours.
The treble extension isn't extreme, I must say, but it's sufficient to maintain a sense of detail and adequate microinformation, especially in cymbals, bowed strings, and natural reverberations. In fact, I notice more micro and macro detail than in more expensive Ziigaat models.

TECHNICAL ASPECTS

Technically speaking, the VSA-V1 features an 11.4 mm dynamic driver with a full-width titanium diaphragm, giving it good transient response and a level of resolution that, while not that of a reference monitor, is higher than its warm profile might lead you to believe.
I can't imagine what its older siblings will be like. I want to try them. So share and support me so this can be possible.
The soundstage of this VSA is more intimate than expansive: the width is controlled, with positioning that places the elements primarily in a frontal arc. It creates a more rounded effect, which prevents it from feeling too intimate and wanting more.
It maintains proper instrumental separation, avoiding a feeling of congestion even in complex passages. The stereo image is stable and coherent, with enough depth to provide decent three-dimensionality without seeking an exaggerated panning effect. The dynamics are one of its strong points: it responds energetically to changes in intensity, has punch in transitions, and maintains good control in fast passages, reinforcing that sense of immediacy and vitality.
Overall, the EarAcoustic VSA-V1 is a solid proposition for those who prioritize an immersive, warm, and impactful listening experience, backed by competent technical standards and a timbre that favors musicality over the neutrality we find with today's "META" brands. Each IEM, a little different from the rest, is a blessing to my ears.

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CONCLUSIONS

Well, you've already seen my review of the VSA v1.
I honestly can't recommend this IEM enough. I think it has many uses, even beyond purely musical ones. I've quite enjoyed them with movies and simulation games. They provided good immersion and enjoyment.
I hope to analyze this company more soon and compare it with its higher-end ranges for those who might be interested. If you want the VSA V1, you can get here.

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Remember, you can also see my review of the SPA if you search for it on my profile.

Thank you for the support and for being there. I try to improve with each review and analysis, being as honest as possible.

Best regards.
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