With the maturity of wireless and Bluetooth technology, Bluetooth wireless speakers have gradually replaced traditional audio as one of the most important members of home theater audio equipment. What I want to bring you to experience today is the portable wireless Bluetooth speaker produced by Pingsheng, an Internet giant that has won a good reputation for its quality MINI Type.

v Appearance

The packaging is as simple and generous as ever without losing taste. Since this year, most of the new products of Pinsheng have used this kind of packaging box, which is really quite high-end compared with the previous plastic packaging.

The front only contains product drawings, HiFi Identify the product characteristics of the main audio quality on the surface, and the exclusive anti-counterfeiting label of Pinsheng

The back is the basic parameter information of the product, the company information of Pinsheng and the public account of Pinsheng WeChat. The authenticity of the product can be queried through customer service

Ok, stop talking nonsense and open the box. The outer packing box is not very small, but I was shocked when I opened it. I didn't expect it to be so small MINI Ah, the height is only a little higher than that of the coffee cup, but it is really small and exquisite, very beautiful!

This wireless Bluetooth speaker has four colors: red, yellow, orange and blue. The one I got is the orange one

The front of the speaker is covered with a fine wire mesh, which is waterproof. There is no problem for outdoor use in rainy days. It is surrounded by a sealed rubber ring, with power switch and Bluetooth on the top / Handsfree key and two volume keys

The bottom is the product model SPK-B002 And other information, IPX6 The waterproof sign is very conspicuous

The audio system has only two interfaces, one for audio output AUX Interface and one Micro USB Input interface, no TF The card slot does not support memory card music playing, which is a pity

This wireless Bluetooth audio supports Bluetooth four In addition, it also supports NFC Touch connection, hands-free call function, very strong compatibility, unfortunately, the product itself except for the audio body and a Micro USB The data line thinks that it does not provide AUX Audio output cable

However, the product quality of Pinsheng is really unspeakable. Even the data line of product accessories is always very careful and never perfunctory

adopt AUX The audio cable can also connect the audio to the computer, MP3 The player can play music in the mode of external audio source. If you need one, you can go to the tasting mall to buy one

The wireless Bluetooth audio of Pinsheng uses the working state of the indicator surface audio. The red light is always on when charging, the red light is off when charging is over, the blue light flashes when Bluetooth mode is turned on, and the blue light is always on when Bluetooth is connected

This audio uses Bluetooth four With simple operation, stable and reliable connection, and HiFi The sound quality sounds really good

v Hardware

As we all know, for audio equipment such as speakers and headphones, the most important parameter is the frequency response, which is often referred to as sound quality. Xiao Bian happens to be a graduate student majoring in acoustics. He has some knowledge of electroacoustics and professional equipment, so he also made a simple assessment of the frequency response of Pinsheng's Bluetooth speaker.

Test equipment includes Bluetooth speakers, computers (including acquisition and analysis software), acquisition cards, and microphones (similar to microphones, which can collect sound)

Generally, white noise is used to analyze the frequency response of audio equipment. The so-called white noise means that the amplitude of all frequencies is the same sound signal, that is, we usually hear the sound of TV without radio. The following figure shows the time and frequency domain of white noise

The sound played by the audio equipment generally has some distortion, especially the low-frequency part. The most ideal audio device is to amplify all frequencies by the same multiple, that is, without distortion, but it is actually impossible. After white noise is played through the audio device, the frequency response of the device can be seen by analyzing the distortion of the collected signal.

You can see that this speaker of Pinsheng 500Hz reach 20000Hz Part of the frequency response of is very good, basically there is no distortion. The frequency range that the human ear can hear is 20~20000Hz It's really not easy for the high-frequency part to do so well. It can be seen that the product is carefully done. But in 500Hz The following low frequencies have serious distortion, which is related to the size of the product. Generally, the lower the frequency, the larger the size of the loudspeaker is required. This is why traditional audio systems are equipped with a large subwoofer. The overall size of the Pinsheng audio system is very small, which can be held with one hand, and the speakers inside are smaller, which can achieve low frequency 500Hz It's not easy.

This is the frequency response of Xiaomi's Bluetooth speaker given on its official website. Xiaomi's Bluetooth speaker is relatively large, but it can only achieve low frequency two hundred many Hz About, and the high frequency is 5000Hz There will be greater distortion. Of course, Xiaobian doesn't have this product on hand, so it's just a matter of comparison.

The above evaluation uses the external audio source mode. Let's take a look at the speaker performance in the Bluetooth playback mode

Musicmobile and Musicspeaker It is to play the collected signals directly with the mobile phone and the speaker Bluetooth mode. You can see that the overall effect of the Bluetooth mode is very good 10000Hz The above high-frequency part is seriously distorted, but it does not affect our normal listening to music.

v Summary

In general, Pinsheng The portable wireless Bluetooth speaker is indeed a masterpiece of excellent audio. Both the material, appearance design and product quality are carefully done, and one hundred and ninety-nine The price of yuan is also worth starting for music lovers. But from a personal point of view, let's also give a little advice to Pinsheng.

one         Although Bluetooth mode is the most popular connection mode, Bluetooth connection consumes more power for mobile phones, so Pinsheng can consider adding it TF Card slot, add memory card play mode;

two         External audio source playing mode is often used, and Pinsheng can consider adding one in the product AUX Audio cable is just a benefit for fans;

three         Display of different playing modes with indicator lights may sometimes appear confused, so it is recommended to add voice prompts;

four         This wireless Bluetooth audio is very small. I understand that it is mainly used for outdoor use. It is designed for portability, so it is not too harsh on audio quality. However, Pinsheng can consider designing another wireless Bluetooth audio, which is mainly used indoors. The size should not be too small. It should be promising to improve the low-frequency sound quality.

Well, that's the end of my evaluation. Thank you very much for the trial opportunity provided by Pinsheng. I believe Pinsheng It will be better and better!