preface

Astrotec Astrid is one of the high-end HIFI headphone brands under Shenzhen Baoshunchang Sound Electronics Co., Ltd. As a well-known acoustic technology research company and audio equipment manufacturer in China, through years of technology accumulation and many classic product development experience, it has developed a variety of different series of high-end headphones. Among them, BX series is Astrotec's sports Bluetooth headset series, which is a headset series suitable for sports and outdoor activities created by Astrid by combining the high quality headset technology with the latest Bluetooth transmission technology. It is suitable for people who need to enjoy music in outdoor activities and sports and have high requirements for sound quality.

The BX50B is one of the BX series products. As the 2016 wireless Bluetooth sports headset of Astrid, it focuses on HIFI sound quality.

As a Bluetooth headset, when it comes to HIFI sound quality, in addition to focusing on the design of the cavity, there is also the chip used. The BX50B uses a well-known CSR Bluetooth chip, which supports Bluetooth 4.1 stereo sound effect. It uses APTX professional audio compression and decoding technology, and can be paired with devices that support APTX audio technology (such as ASUS ZENFONEZOOM Eagle Eye) to obtain better experience. According to the reference, Ashtree BX50B has broken through three traditional technical barriers in technology: the matching of Bluetooth motherboard and speakers, the allocation of speakers and cavities, and the secondary tuning of speakers, which has further improved the sound quality of Bluetooth mode. However, it still needs practical experience to really understand the actual performance of the BX50B.

Note: Apt-X is a digital audio compression algorithm based on subband ADPCM (SB-ADPCM) technology, which is mainly used in professional audio field. It realizes delay minimization through low delay technology of audio coding. Apt-X can truly restore audio in the whole frequency range, enabling wireless Bluetooth connection to provide high-quality stereo audio.

You may need to understand the part of BX50B

1. The headset is light, ergonomically designed and comfortable to wear

2. CSR chip is adopted, with stable performance, supporting Bluetooth 4.1 and aptx

3. Two sets of large, medium and small ear muffs, silicone and rubber, can be replaced to meet the needs of non users

4. Dual mobile phone connection is supported, but this mode is not suitable for listening to music, and the sound quality is significantly reduced

5. Support OTG charging of Android phones, and provide corresponding power cord

6. Support voice reminder functions, such as power on/off, low power, call number broadcast, etc

7. The treble is not too prominent, but relatively smooth; The vocal part is stable and suitable for popular songs; Insufficient sense of bass, not deep dive

Product Introduction

The design of the packing box is not amazing, but the list of items inside is a bit surprising. In addition to a long and short power cord and a leather storage bag, there are three pairs of silicone and rubber earphones of different sizes in each pair, which are enough to meet the wearing needs of different people. The headphone cable is made of ultra light medical grade anti allergic material, and adopts a noodle design with excellent flexibility, which is waterproof and tensile.

Silicone earmuffs are light green, and rubber earmuffs are divided into three colors according to the size. At the same time, there is a white hub used to fix and adjust the headphone cable, and a pair of ear loops used to help the headphone wear more firmly and prevent the headphone from slipping.

The first feeling of holding the headset is light. The surface of the earplug is divided into silver matte metal like material and black green plastic material, which makes the earphone look not monotonous, and the green part in the middle also makes the earphone look active and dynamic.

The earphones adopt magnetic suction design, which can not only attract each other for convenient storage and arrangement, but also be hung on the chest when not wearing earphones at rest.

Personally, the chamber of the earplug is not large, and it adopts a 9.0mm dynamic coil unit design. There is no obvious difference with ordinary earplugs in wearing. The ergonomic design is more comfortable in wearing, and it is not easy to slip when moving.

The BX50B supports the remote control function. It adopts a three button design, that is, the volume increase and decrease buttons at both ends and the multi-function button in the middle. It is compatible with most Android devices and iPhones. Multi function keys are used to switch on/off, pause and play songs, answer and end calls. The detailed key functions have different operations in call and music playing modes. Please refer to the user manual. MIC is designed on the volume increase button, with noise reduction function.

The headset has a voice prompt function, such as power on/off, low battery, etc. The volume increase button is designed with a status indicator light and a MIC, and the indicator light has blue and red statuses. In Bluetooth pairing mode, the red and blue indicator lights flash alternately, as shown in the first right figure below.

As a Bluetooth headset, the BX50B can not only connect different Bluetooth devices, but also connect two mobile phones at the same time, which is also its highlight. The operation is also very simple. The steps are as follows:

1. Phone A and BX50B are successfully paired and connected, and the connection is manually disconnected from phone A

2. Press the volume increase/decrease button at the same time until the red and blue indicator lights of the headset flash alternately, and then enter the pairing state again

3. Phone B turns on Bluetooth and connects with BX50B

4. Mobile phone A can be manually connected to BX50B

What if two mobile phones A and B receive an incoming call at the same time? When A is talking, B receives an incoming call and presses the multifunction key for 2 seconds to reject the incoming call from Party B; At the same time, press the volume up and down key to answer the call from B, and the call from A is reserved. Press the volume up and down key again, and switch back to the call from A, and the call from B is reserved. Click the multifunction key to end the current call, and the headset will automatically switch back to the other party. But one problem is that the sound quality effect is significantly reduced.

The leather storage bag comes with the package. I prefer the round storage box, but it is better to have one than not.

As for the long and short power cord, the long one is the ordinary micro USB power cord. The short cable of the dual head micro USB interface is a practical accessory used with Android phones to charge the headset through OTG.

The actual wearing effect shows that the length of the headphone cable is not too long, so the harness is not necessary. Even when running, there will be no large swing or swing, which will reduce the frequency of face beating and the effect of stethoscope to a certain extent.

The way of wearing varies from person to person. Choose the way you like.

Next, enter the product experience stage, focusing on the experience of the sound quality and whether the stethoscope effect is obvious under sports.

Product experience

First, try the compatibility of Bluetooth connection and the performance of automatic loopback. Through the test of the actual equipment at hand, no problems were found in connection and use.

In fact, these Samsung phones also support apt-x, but they are not directly displayed like ASUS Eagle Eye after successful pairing. In the actual music audition, choose to match with ASUS Eagle Eye.

Before the formal audition, the BX50B was warmed up for about 83 hours according to personal habits (earphone burning). The necessity of this is different from person to person. There is no absolute answer, and no one needs to convince anyone (who cares about me). The audio setting wizard of ASUS Eagle Eye mobile phone terminal adopts intelligent mode, and no longer manually set the detailed functions.

Take Four Seasons, Beethoven Virus, Jasmine Blossoms, and High Mountains and Flowing Water as examples. The voice is clear and natural. The treble is not too prominent, but it is smooth. The change and connection are smooth and natural, without burr or sharp feeling. The rhythm of Badinerie is cheerful and smooth, but the separation between instruments is not obvious, and there is a mixed feeling. It is appropriate to listen to Guzheng and Guqin.

Take Counting Stars, One I Love, Grandmother's Penghu Bay, Berlin Lovers, Moonlight Serenade, and Li Jian's City Night Returning People as examples. The voice is mellow and full, and the words are clear, but there is a sense of distance, rather than the feeling of surrounding singing in the ear. However, A-Lin's Song of Thinking of You+Old People Drinking is quite good, which shows A-Lin's voice very well. It is crisp and bright, without vibrato, sharp sense, and has a sense of power. The song is cheerful and bright, and has a sense of being brought into the scene. At the beginning of Hurricane 2000, the compact musical instrument part can be fully displayed, with a strong sense of rhythm and strength, but the voice and instrument are mixed together behind, and the separation is not high.

Take Drum Poem and Sad City as examples, the scene change is not delayed, but the bass is not enough, the dive is not deep, and the voice is relatively dull. The difficulty is that the low-key music part at the beginning of "Sad City" can also be easily displayed. As for "ルフィィィィルフィィィィルフィィィィィルフィィ12451. However, you don't have a strong demand for bass, or you don't care too much, which will not affect the audition. But generally speaking, there should be few opportunities to listen to bass songs during running.

With "F16 Fighter" and "Wild Pumpkin", the performance in the sound field and position is very good, and people can intuitively feel the sound from far to near, from near to far, from bottom to top. There was something unexpected about the sound performance, which was really good.

As a Bluetooth sports headset, when you wear it when you go out for sports, you pay attention to the outdoor sound insulation effect and the stethoscope effect. The adjusted volume is about 75-80%, and the sound insulation effect is obvious. If you wear it, you should pay attention to safety when riding on the road, jogging or walking. The effect of stethoscope is not obvious in running and is not easy to detect. It is much better than JOWAY H07.

From the actual effect of making calls (indoor, roadside), QQ, WeChat and other calls, the sound quality is relatively clear, and there is no interference sound or current sound. It may be related to the above-mentioned secondary tuning processing, and of course noise reduction should also be optimized. For the official mentioned

For the endurance, from playing music through Bluetooth connection in full power mode to automatic shutdown, the Bluetooth volume is about 75-80%, and it can be played continuously for more than 7 hours (based on ASUS Eagle Eye), which can meet the needs of outdoor use. It takes about 2 hours to complete the process from low power off to charging with Samsung 1.55A power adapter.

Experience summary

From the actual experience, I am quite satisfied with the overall performance of Astrid B50. For the manufacturer's publicity, we can pay attention to it, but we can't trust it all. Our own actual listening and use experience shall prevail.

As a Bluetooth headset, the BX50B is fully capable of listening to music, making calls and other functions. As a HIFI Bluetooth sports headset, its sound quality performance is not perfect enough. Of course, this is the common feature of common Bluetooth headsets, but it also has good performance, which can meet the needs of listening to music; It is comfortable to wear, without obvious stethoscope effect, and has good sound insulation effect. The vibrant jungle green color makes the headset look more dynamic; It is also more practical to use Android phone charging design.

People who are used to using Bluetooth headsets or who often wear headsets to exercise can pay attention to it.

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