Acoustune Expands the HSX1001 Convertible System with New German Silver Wired Module 『C:03 M:02G』
FOR IMMEDIATE RELEASE
Tokyo, Japan – July 29, 2025 – Tokyo Onkyo Co., Ltd. today announced the exciting second release in its upgrade gadget series for the existing Acoustune HSX1001 'Jin' TWS model. The new『HSX1001 C:03 M:02G』 is a combined acoustic chamber and wired module set designed for owners of the HSX1001 system, offering a new sonic palette and high-fidelity wired listening capabilities.
This highly anticipated upgrade will be available for purchase starting
Saturday, August 8, 2025.
Unlock New Potential in Your HSX1001
The new C03M02G module leverages the innovative modular structure of the HSX1001 'Jin' TWS, which features a unique design where the acoustic chamber and the main module can be detached and swapped independently3. This launch provides HSX1001 owners with a powerful new way to customize their listening experience.
Module Features:
Acoustic Chamber "C:03" – The Sound of German Silver: At the heart of this upgrade is the "C:03" acoustic chamber, built from German silver (nickel silver). This material, often used in musical instruments like flutes, helps produce a rich and resonant mid-to-high frequency range. To ensure a balanced and powerful sound, the chamber houses a newly designed double-magnet driver with a titanium-domed diaphragm, delivering smooth highs and a focused, strong low-end.
Wired Connection Module “M:02G” – High-Fidelity Wired Audio: The “M:02G” module allows users to convert their HSX1001 into a wired earphone for a different listening experience7. It features the highly durable Pentaconn Ear connector for a stable connection8. The module’s housing is finished in an elegant Sage Green, a heritage color inspired by the classic Acoustune HS1503 AL model.
Included ARC83 Balanced Cable: The package comes with the flexible and durable "ARC83" cable, equipped with a 4.4mm 5-pole plug for balanced audio playback with compatible devices.
Complete System Compatibility and Customization
This upgrade vastly expands the versatility of the HSX1001 system. All modules and chambers are fully compatible11. An owner can:
Attach the new
C:03 German silver chamber to their original M:01 wireless module to enjoy this new sound signature wirelessly12.
Pair their original
C:01 aluminum chamber with the new M:02G wired module, creating a wired version of their standard earphone.
Combine the new
C:03 chamber and M:02G module for a complete German silver wired earphone experience.
The package includes a precision screwdriver and replacement screws, making it easy for users to swap components at any time
Voices from the Show Floor
by @九段 (Jiu Duan):
"Unlike the engineering prototype I saw at CanJam, this is the complete production version. The main change is that the M02 module is now the M02G, featuring a dark green finish that creates a better visual match with the C03 acoustic chamber. Secondly, the included cable has been upgraded to a new, more robust and high-grade model.
From a listening perspective, the C03 is the highest quality and most musically versatile of all the current wired options. Paired with the M02G, the entire sound presentation feels more transparent and significantly richer in detail compared to the C02. The texture in the mid-to-high frequencies is especially addictive—I'm incredibly tempted to buy a set for myself!"
by @木耳听个响 (Muer Ting Ge Xiang):
"When I first heard this module, I already felt its price-to-performance ratio was off the charts. Once the sound opens up, it truly competes at the level of the [Acoustune] HS1790 model. Moreover, the midrange has a substantial thickness and that classic, full-bodied 'dynamic driver' character. For a reference on the vocal timbre, think of the second chamber available for the HS2000.
This time they showcased the final version with the official 4.4mm stock cable, and the fullness of the sound showed another very audible improvement. I can already foresee people buying this third module for its sound signature alone."
by @李凌佳琪 (Li Ling Jiaqi):
"This is the third module for Acoustune's TWS system, the C03+M02G, which is priced at approximately $400 USD(2,888 RMB) with the cable included as standard.
When I first heard this module, I already felt its price-to-performance ratio was off the charts. Once the sound opens up, it truly competes at the level of the [Acoustune] HS1790 model. Moreover, the midrange has a substantial thickness and that classic, full-bodied 'dynamic driver' character. For a reference on the vocal timbre, think of the second chamber available for the HS2000. This time they showcased the final version with the official 4.4mm stock cable, and the fullness of the sound showed another very audible improvement. I can already foresee people buying this third module for its sound signature alone."
by @HCz1v (Potechino):
"I had the opportunity to audition the earphones, and in terms of sound, I much prefer the C03 over the C02. I'm completely satisfied being able to listen to music with such great sound.
by @耳机美学 (Headphone Aesthetics):
"The all-new German silver acoustic module, C:03, has finally arrived in its final production version. Compared to the C:02 brass module, the C:03 in wired mode offers a clearer, brighter sound with sharper imaging and a stronger sense of technical performance. This elevates the overall sonic competitiveness of the HSX1001 system to a new level.
When paired with the M:01 Bluetooth module, the C:03 transforms into a wireless earphone that truly achieves a high-end, HiFi standard. It has a remarkably clean sound signature, and both its technical performance and musicality go far beyond the realm of a typical TWS."
by @dantakatan (dantaka):
"I auditioned the C:03, the wired configuration of the German silver acoustic chamber for the Acoustune HSX1001 Jin. The sense of dynamism, the resonance, and the spaciousness are all superb—it's a very good sound. I want this.
by @Sathuki_Hobby (Sathuki_hobby):
"I'm trying out the C: Series now. It's not as flashy as their older models, but it seems to have its own unique character. The fit is extremely good. I'd like to buy it someday.
Disclaimer: The above comments are sourced from public social media posts, reflecting genuine user impressions during the event. They are not intended as definitive evaluations of the final product.