Breakthrough true wireless earphones with cutting-edge Bluetooth SoC

29 October 2018

Credit: Samurai Ears Japan | Indiegogo

Samurai Ears Japan, an audio-visual brand, have announced their audiophile-grade true wireless earphones, STW-D01a – which features the latest Bluetooth Audio SoC, Qualcomm QCC3026, based on an ultra-low-power architecture.

Samurai Ears Japan's (SEJ) Samurai Sound project started almost 3 years ago, with a group of experts who brought with them long-standing experience in the planning and development of portable audio products in Japan. The company saw countless trials and failures before they could achieve the sound level of professional audio equipment at recording studios and broadcast stations – and to reach the level of quality and precision that can be called 'truly Japan-quality'. The result of SEJ’s efforts is the now-completed final prototype: STW-D01a.

Many audio equipment products of recent years are designed with China as their main market (due to China’s rise as a major economic power). These products are also widely available in other countries primarily due to their low prices. However, as commonly known, music and sound tastes in China do not necessarily correspond to those in countries and regions with a relatively longer audio history, such as Japan and countries in Europe, the Americas, Oceania, and Southeast Asia.

The sound quality that Samurai Ears aims to deliver is high-speed, with a large amount of sound information, but flat without exaggeration or tic, and of the level heard on professional audio equipment and musical instruments at which Japanese audio experts excel.

The Samurai Ears’ acoustics have been designed meticulously to faithfully reproduce the exact sound quality that recording engineers envision, for a diverse spectrum of music, ranging from classical music played by grand orchestras to hip-hop. Samurai Ears is perfect for discerning audiophiles who truly know and appreciate sounds of high-end audio equipment.

Use of Qualcomm QCC3026 chip, the latest SoC exclusively made for true wireless earbuds

JEC consider themselves especially fortunate to have encountered the exceptionally high-performing QCC3026 chip in their development phase. After all, conventional true wireless earbuds proved of inadequate performance, and had 2 serious issues: short play time and signal instability (in other words, intermittent play).

The latest SoC, QCC3026, has proved the solution to the above issues, and SEJ are proud to be the first audio brand in the world to implement it. In answer to such battery life and signal integrity issues, the QCC3026 saw the following:

- Up to 9 hours of continuous playtime with the earbuds alone

- Maximum play time of approximately 60 hours in total, including the in-case battery

- Robust Bluetooth signal connection

What’s more, QCC3026 is capable of containing a dramatically larger amount of sound information than conventional SoCs: and further improved Samurai Ears earbuds’ sound quality.

Credit: Samurai Ears Japan | Indiegogo

Compact and lightweight, IPX7-grade waterproof design

Ease of use is also SEJ’s priority, and STW-D01a has been designed based on ergonomics: the company reduced the earbud weight down to approximately 4 grams per side, without sacrificing sound quality at all. Moreover, SEJ’s earbuds are waterproof enough to withstand brief submersions, thanks to various creative efforts (such as special coating on the joints).

Aspiring for even higher sound quality

Another shortcoming of conventional wireless earphones is the sound being out of sync with the (latency) the entertainment that users watch on their devices. In order to solve the said latency problem, SEJ not only re-examined the circuit design of Samurai Ears, but also made them Qualcomm aptX-compatible. Latency is a lesser problem with aptX after all, and many Android smartphones are compatible with it.

aptX also provides higher sound quality due to its lower compression rate, and its capacity to contain much more sound information than the standard Bluetooth codec, sub-band coding (SBC). Of course, with the use of compatible smartphones, it also supports Bluetooth 5.0, which doubles the communication speed and increases the communication range by 4 times.

A charging case with built-in high-capacity Lithium polymer battery

The exterior of our charging case has been coated with a durable and beautiful duralumin for long-lasting protection of the earbuds. The charging case is also equipped with a high-capacity lithium polymer battery, extending total play time to 60 hours.

For more information, visit the Indiegogo crowdfunding page for Samurai Ears on this link:

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