The Danish B&O stereo, which has been hailed as the king of industrial design in the audio industry, has always had a high value for taste design. Whether it is a large speaker or a car audio system, B&O's integration with modern industrial design and cutting-edge technology is revealed everywhere. The design of the lift and tweeter used by B&O on the Audi A8 sedan has attracted many people in the industry so far. Thanks to the design of the 4-inch full-range low-frequency unit, A1's low-frequency style is full of impressive expression. The more pleasant surprise is that even in the Bluetooth state, A1 can well restore the metallic low-frequency sound in the movie scene. The overall low-frequency partial vector sensation is expressed with a certain degree of low-frequency rigid timbre expression, and satisfactory visual and audio expression effects are also provided for dive. In the drum response where the low-frequency transient expression is relatively tight, the low-frequency ending of the drum is somewhat unnatural. High frequency performance: This time despite the single-cavity structure, the A1 is still equipped with an independent 3/4 inch hemisphere treble, so the B&O has always maintained a clean, mellow and glossy sound style for high frequencies. Especially the high-frequency string music and the extremely wide range of piano sounds will not appear dull, this is the product of the same type only rely on full-frequency unit support, it is clear that A1's configuration and sound style have obvious advantages. 4.14mm Wire To Board Connector ShenZhen Antenk Electronics Co,Ltd , https://www.antenkconn.com
In recent years, more and more popular Bluetooth speaker design, B&O has not given up to explore young people more favorite taste design and sound quality pursuit and compromise. In the clever and compact metal structure, the BeoPlay A1 with high and low frequency dual speakers came into being. The author took advantage of the May Day break to provide a detailed evaluation of the BeoPlay A1 in this structural configuration. In the end, please read this article carefully for the design process and sound quality.
The A1 packaging adopts a square structure world cover structure, and the color material style adopts the BeoPlay brand light gray blue, taking into account B&O has always designed the layout without extra product related description information.
On the back there will be a detailed product structure description, in the upper right corner you can see that BeoPlay A1 is included in the BeoPlay APP support, BeoPlay APP supports all related speaker and headset binding operation controls (can be found in the APPLE App Store and Google Store or the official website to download ). The back package only has a very concise Chinese in the bottom right corner: dust and splash, can be played continuously for up to 24 hours.
After opening the package, many people will be amazed by the A1's metal mask, refined and round honeycomb-like metal styling in the light reflects people feel very fine details of the texture, the product's lanyard is linked with a metal nameplate with a LOGO .
At the bottom of the package, you can see that the accessories only have charging cable and manuals for after-sales manuals. It will be more surprising that the data line adopts the latest TYPE-C interface design, which is a bit advanced for many mainstream Bluetooth products that still use ordinary MicroUsb.
The A1 measures 133mm in diameter and 48mm in height, and the body weighs about 600g. The surface aluminum metal mask cover has a curved curvature design. The comparison is to achieve a uniform hole layout in the processing of this surface cover. There is a layer of speaker mesh cloth under the metal mask, and there is a dustproof and splash proof outdoor application design. .
Different from the upper cover of the metal body, the lower half is a plastic material designed with a rubberized paint that simulates the texture of the skin. This has a very good low-frequency resonant suppression effect at the bottom of the speaker. In the upper left corner, you can see the design of a microphone with a long round hole. The design is located at the bottom of the step gradient, but it can effectively achieve a 360-degree environment for high-definition pickup design, meeting the A1's pursuit of high-quality sound at the call conference.
Each logo on the A1 itself is a button. For example, there are three button designs on the right side. The circular button is to play the connection button. Click to play the recently connected device streaming music. The Bluetooth symbol is the bind open button. Press and hold for three seconds and it will start flashing to detect the bound state. The microphone symbol is to answer and hang up, and only need to press to use A1's built-in microphone for talking during the call.
The right side of the fuselage is equipped with a power switch button. The left side is also provided with a multi-color LED lamp that can recognize the status. It is normally white when turned on, and is detectable when the blue flashes. The addition and subtraction symbol buttons are the daily corresponding volume controls. The design of the entire design from the symbol to the button is quite intuitive.
A1 fuselage with a USB TYPE-C type charging port, regardless of the positive and negative insertion will not insert the wrong is also the advantage of this interface, by the right is the power charging identification indicator, charging will gradually turn orange from red The breathing state can be quite refined. The fuselage built-in battery is 2200 mAh design, fully charged about 3 hours.
The A1 has a very pleasing little detail. It is specially designed with a unique aluminum metal frosted small tag that looks very delicate. With the old anti-fur leather cords, it ensures the hook strength and looks quite stylish. Design quality.
A1's speaker configuration structure is different from the mainstream of the small Bluetooth speaker, Bluetooth transmission module latest support to the 4.2 version can be described as some advanced, equipped with powerful neodymium magnet unit and high peak power amplifier new aluminum cone bass speaker, can A full-range deep subwoofer with a low performance of 40 Hz (label 2 in the figure). The fully dynamic two-way algorithm design of the 3/4 inch hemispherical tweeter (Identification Figure 1) and the advanced DSP filtering technology enables the high- and low-frequency dual-unit combination architecture to effectively express crisper, louder, yet fuller sounds.
From the perspective of acoustic design, A1's adjustment algorithm for the dynamic pursuit of DSP technology is currently designed to integrate a high- and low-frequency unit at a price of 4 inches or more with a high-pitched structure. B&O's design can be described as a very compact cavity. design. And A1 can allow two A1s to simultaneously connect a mobile phone to play sounds at the same time, so that it can easily become a combination with left and right stereo sound.
From the design details and acoustics of every detail on the A1, this product can be regarded as excellent in terms of technology and hardware configuration. In particular, A1's shell feels very delicate to please, although it looks a little heavier in the hands, but also to ensure that the product's configuration of materials, is different from the general Bluetooth speaker to compromise sound quality and workmanship materials casual approach.
A1's operation is quite simple, press the power button and then press the Bluetooth button to start the blue light flashes can be detected binding, after binding can be selected in the phone music player and in IOS and Android can see the use of power status . 
If you have more than one B&O Bluetooth speaker device, you can also manage these speakers and mark them through BeoPlay's APP application (app store and Google store and download on the official website). Through this application you can gain management and operation convenience, and also support setting. Different sound effects settings allow you to easily and intuitively feel the different types of sound adjustment differences. 
Evaluation equipment: Kai N6 lossless DAP player, HIDIZS AP100 player innovation X7 sound card decoding amp machine
Mobile phone test: IPHONE6S PLUS As the IP6SP does not support Bluetooth APTX lossless, specially using VIVO XPLA5A as a Bluetooth 4.1 APTX support test.
A1 has two A1s that are bound together at the same time to play a combination of mobile phones to form a two-stereo mode. This test was only one, so it failed to test the mode.
Sound field performance:
The large volume of A1 sound pressure is unexpectedly higher than that of the same size product, and the use of 30 square meters is more than sufficient. Considering that A1 uses a 4-inch unit and a DSP circuit and amplifying design to actually test, when the ear is close to the ground, it is hard to hear the bottom noise, but it is also powerful enough to drive the speaker. Despite the use of a high-angled housing and acoustic construction, there is a good 360-degree ambient sound reinforcement when laid flat, but the sound is directed to the front side of the horn for the forward diffusion, the two A1 can become more stereo environment when used Effects and recognition.
The sound field style is dominated by vocal highlights and sound foreground images. The sound subjects and vocal positions are very prominent, and they are biased towards the deepest and most prominent type. They are suitable for interpreting the sound field expressed in both pop and movie video, and for some stringed solo instruments. Deduction has a very good expression of space support.
Low frequency performance:
Considering that A1 is a closed speaker structure and has no conduit design, low frequency will be affected in terms of output detail efficiency. B&O is very good at using the structural weaknesses of acoustics. Instead, it emphasizes the pure and full low frequency direction, which makes the sound propagation space and the low-frequency impact force expressed ideally. In particular, the volume is also relatively heavy and provides certain advantages of stable sound. . So A1's low-frequency analysis is not very delicate, but winning is a powerful and full-fledged trend that is suitable for a variety of pop music and movie scene restoration.
IF performance:
Although as mentioned earlier, A1's midrange frequency is very prominent, but the A1 low-IF transition in the DSP on the modification of the sound, so that the low frequency does not interfere too much to the details of the vocal. The A1's mid-range is relatively sturdy and has a very good resolution. Listening to vocals, especially men's voices, is also very good. Listening to the female voice will also find that the actual A1's mid-high frequency transition is good, and the more delicate female voices, especially the arrogant voices that are supposed to perform, are rather pleasing.
It can be said that thanks to the circuit and amplification design, A1's IF part has been balanced and balanced. Especially when the vocal position is relatively high, for the sound reinforcement properties of the Bluetooth speaker, many people can hear clearer MF voice expressions in this small speaker. The overall range of instruments in the daily mid-frequency range also shows a clean, rich texture. However, A1 has less emphasis on melody and embellishment, and it prefers straightforward type of midrange deductions. The A1 does a pretty good job in the natural sense of midrange. Considering the daily listening to popular female voices or the European and American lists, the actual A1's midrange performance can be considered as an excellent performance.
After all, for the high-frequency part where many people are most sensitive to perceived sharpness, A1 can be said to have done a fairly clear and rich texture, especially high-frequency rigidity and toughness, enough to cope with a lot of classical small-scale or UHF under the big stage. Detailed expression of space. If you listen to some solo class or pure music genre in the small room everyday, you will find that A1's high frequency is quite pleasing and penetrating.
A1 in the design to achieve a very fine at the same time, but also uses an independent tweeter and full-range low frequency unit, and the DSP circuit and amplification are also uncompromising design pursuit. This makes A1 a typical small and loud typical, and people would be quite amazed to hear relatively loud and loud sound pressure playback in such a small volume. So for those of us who are engaged in audio earphone products, I also think that the expensive A1 Bluetooth speaker with process design can be said to be the ultimate in volume and sound.
Also not to be underestimated is that the weight of the 600g is still very difficult to put in a small bag. The A1 is more suitable for people who are dragging suitcases and notebooks, or can be placed in the home environment or the conference table as a teleconference pick-up or car-free. To mention applications, you can feel that this product is quite comfortable to use.