ASCII.jp Shure, Bluetooth 5.0 compatible cable "RMCE-BT2" that is compatible with aptX HD and is particular about sound quality

Sure Japan released the Bluetooth 5.0 compatible wireless earphone cable "RMCE-BT2" on October 26th. It can be used as a replacement cable for earphones equipped with an MMCX terminal, such as the "SE215" and "SE846", and uses an amplifier different from the "RMCE-BT1" announced last year to improve sound quality. The price is an open price. The selling price at the store is around 20,000 yen.

Don't underestimate the improvement of the amplifier ...

In general Bluetooth devices, in addition to the blocks required for wireless communication, a chipset that integrates DAC, ADC, amplifier functions, etc. is often used. This is because it is easy to develop and has advantages in terms of power consumption and size. However, in RMCE-BT2, the amplifier part was originally developed to improve the sound quality.

According to Shawn Sullivan, senior product manager of listening products who came to Japan, "Amplifiers are often neglected in the development of Bluetooth devices, but if you compare them to cars, they are equivalent to engines and are very important."

In RMCE-BT2, the amplifier built in the chipset is bypassed, and the earphone is driven by an external high-output amplifier. Although the power consumption increases by that amount, the capacity of the built-in battery has been increased to about 200mAh to secure a maximum driving time of 10 hours. Weight is 18g. It is heavier than the BT1 but has a slight weight increase. The length of the cable is 73.7 cm.

Qualcomm's "CSR8675" is used as the Bluetooth chipset. Supports codecs such as aptX, aptX HD, and aptX Low Latency. The distortion factor when using aptX HD is 0.02%. The frequency characteristic is 10Hz to 22kHz (± 0.5dB). The output is not disclosed.

It has a quick charge function that can be used for 1.5 hours with a 15-minute charge, and an unoriented MEMS microphone that can be used as a headset. Bluetooth supports multi-pairing / multi-point, and up to two devices can be connected at the same time.

Especially easy to use because there is a main body clip

The body is a necklace type. The main body with the battery and amplifier is at the tip. It is easy to use because it has a clip on the back that can be clipped to the chest pocket or collar. Equipped with a remote control in the middle of the cable. There is also a holder that bundles the left and right cables to prevent touch noise.

The remote control unit is a general 3-button type.

When it comes to sound, it's very straightforward and flat. I feel that I can get a glimpse of what Sure's ideal tone is. Of course, you can fully draw out the capabilities of your own high-end machines such as SE846, but you can also combine it with other companies' products. I tried earphones I had, such as AZLA's "HORIZON", but in addition to having good visibility in the midrange, I was able to confirm that the low range came out firmly in front, and I realized that it had a high driving force.

However, considering the size, it is unavoidable, but in order to obtain an appropriate volume, it was necessary to set it to a higher volume position as a whole. When paired with low-sensitivity earphones, you may need to make sure you get enough volume. However, I think that the static characteristics such as less distortion and less noise are sufficient compared to a single player. In other words, it can be held to improve the sound quality compared to the headphone amplifier built into the smartphone. Regarding sound quality, I also felt that it was better than buying a small high-resolution player.

I especially recommend the RMCE-BT2 to those who already have high-end earphones and want to enjoy music with high-quality sound comparable to a wired connection even with a Bluetooth connection. As a matter of course, Shure earphones are the best match products.

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