The ROXA-S100 is a new model developed as the successor to the MIROAK-II.
It inherits the sound character of the flagship LOAK, while the newly designed housing improves both comfort and stability.
By refining the housing materials, it achieves near-flagship sound quality at a more accessible price point.
In this article, we’ll take a closer look at the details of the ROXA-S100 — its design, sound differences compared to other models, and the wooden backplate materials available.
For product specifications and ordering information, please visit the product page linked below.
Housing:
It has undergone a major change in both shape and materials from the previous MIROAK-II.
Front Housing: Stainless steel
Body Housing: High-Precision Resin (3D Printed)
Rear Housing: Various types of wood
The front housing of the ROXA-S100 uses the same stainless steel design as the flagship LOAK2.
Although resin was initially considered for cost efficiency, it did not deliver satisfying acoustic results, so stainless steel was chosen instead.
While it has a slower sound transmission speed compared to titanium, stainless steel excels at suppressing the vibration of the dynamic driver, resulting in a more stable and controlled sound.
This contributes to clear imaging and tight, powerful low frequencies.
The main body housing is made of high-definition 3D-printed resin.
Compared to the ABS resin used in the previous MIROAK-II, this harder resin provides quicker mechanical response to driver movement, enhancing resolution and overall clarity.
At the same time, it helps reduce production costs, making the ROXA-S100 more accessible without sacrificing sound quality.
The body is dyed with color penetration and finished with a protective coating.
Because the color seeps into the material itself rather than being applied only to the surface, minor scratches are less likely to cause discoloration, allowing the product to maintain its appearance over time.
Housing Design and Structure:
The housing of the ROXA-S100 has been completely redesigned from the ground up.
Starting from a blank canvas allowed us to address usability issues found in previous models and greatly improve overall comfort.
Compared to the MIROAK-II and LOAK2, the new shape provides a more stable fit by securely holding the ear from both the front and back sides.
This enhanced stability helps to further suppress unwanted vibration, resulting in a more focused and consistent sound.
The cable exit angle has also been refined, allowing the earphones to be worn more naturally and comfortably, with a cleaner and more streamlined appearance.
As before, the rear housing backplate can be customized with a variety of selected wood materials.
For the ROXA-S100, the thickness of the wooden plate has been reduced by half, and its diameter made slightly smaller — contributing to lighter weight and an improved fit.
Additionally, the acoustic vent (port) that manages airflow behind the dynamic driver is now positioned within the wooden section rather than the resin body.
This design takes advantage of the wood’s natural internal damping and sound absorption properties, which help moderate internal air pressure changes.
The result is a sound that maintains the benefits of a semi-sealed structure — tight and stable low frequencies — while avoiding the sense of pressure often felt with fully sealed housings.
Sound:
The ROXA-S100 delivers a level of sound quality above the MIROAK-II, positioning itself close to the flagship LOAK2 in overall performance.
In many ways, it can be described as the stainless steel + resin version of the LOAK2.
While the LOAK2 is priced higher due to its premium materials and complex construction, the ROXA-S100 offers a similar listening experience at a more accessible price point.
Depending on your preferences, you may find that the ROXA-S100 delivers enough performance that upgrading to the LOAK2 isn’t necessary.
Tonally, it sits between the LOAK2-TX01 (02) and TX03, offering a balance of strength and refinement.
Although the stainless-and-resin configuration doesn’t match titanium’s speed and density, the precise airflow control behind the dynamic driver and slight diaphragm tension create a sharper, tighter, and more controlled sound than the MIROAK-II.
The overall sound character is defined by powerful low frequencies derived from the housing materials, paired with natural and mild mids and highs.
Compared to the MIROAK-II, it presents a more balanced and cohesive tuning, making it both engaging and comfortable for long listening sessions.
This flexibility allows it to adapt beautifully to a wide variety of music genres while maintaining the smooth, organic warmth that defines the 634EARS sound.
Start with the ROXA-S100 — it may already deliver everything you’re looking for.
If you ever seek even greater depth or material refinement, the higher-end LOAK models await beyond.
Backplate:
The backplate of the ROXA-S100 has been redesigned to be smaller in diameter and less than half the thickness of those used in previous MIROAK and LOAK models.
This change contributes to a lighter overall weight and improved wearing comfort.
Because the wood portion is smaller, the influence of wood on the overall sound is slightly reduced compared to previous models.
As a result, differences in tone between wood types are more subtle, allowing users to enjoy a consistent sound regardless of their wood selection.
The resin body of the ROXA-S100 also plays a role in this balance.
Unlike metal housings, the resin structure provides slight flexibility, allowing the body to gently “breathe” with the driver’s movement.
This flexibility maintains natural back pressure and reduces the degree of tonal variation caused by different wood densities.
We produced four wood samples — Snakewood, Honduran Rosewood, Black Persimmon, and Burl Camphor.
Among these, Snakewood produced the most defined and tight sound, while Black Persimmon and Burl Camphor were remarkably similar, with minimal audible difference.
You can choose based on acoustic properties such as hardness or density, or simply by aesthetic preference.
Unlike previous models, the ROXA-S100 allows you to enjoy its sound without worrying too much about wood selection — giving you more freedom to pick the look you love.
