How to choose MP3 and MP5
The MP3/5 models currently on the market come in all shapes and sizes, and the quality and sound quality are not known to be good or bad. There are many no-name and copycat machines emerging one after another. Shouted as good, causing the majority of consumers to suffer. Therefore, how to choose a P3/P5 with good quality and good sound quality is urgent.
To choose a P3/P5 that you like, with good quality and good sound quality, you should go through three steps: first look, second listen, and third comparison.
Take a look:
1. Look at the appearance:
The appearance of a product can be judged largely by its workmanship and poor feel. , The overall quality of products with bad color will not be that bad. On the contrary, the quality of products with exquisite workmanship, bright color and good feel will not be that bad.
2. Check the certification:
A. Check whether the product you choose carries a registered trademark. Many no-name and copycat machines will not carry a registered trademark.
B. Check whether it has passed the compulsory certification of the General Administration of Quality Supervision, Inspection and Quarantine of China, that is, 3C certification.
C． Check whether it has passed the international green environmental protection certification ROSH. The lead content of the materials used in MP3 and MP5 cannot exceed 0.1%, otherwise it will be harmful to the human body. Products with ROSH certification contain less than 0.1% aluminum and are harmless to the human body.
D. Check whether it has passed the US FCC certification and the EU CE certification. FCC is the US Federal Communications Commission's mandatory safety certification for electronic and electrical products entering the US market. Only products with FCC certification can be sold in the US market. CE certification: The 27 EU member states have mandatory safety certification for electronic and electrical products entering the EU market. Products with CE certification can be sold in the 27 EU member states.
3. Check the supported formats:
Whether it supports APE/FLAC dual lossless music format,
There are two compression methods in the field of audio compression, respectively They are lossy compression and lossless compression. Our common MP3, WMA, OGG, etc. are called lossy compression formats. Another type of audio compression is called lossless compression, that is, APE/FLAC, which can save 100% of all the data of the original file. The original music is not lost at all, and the sound quality is comparable to that of a CD.
4. Look at the USB interface and chip
There are two USB interfaces currently used in MP3, one is the USB1.1 interface, transmission speed: 12M/bps, and the other is USB2.0 interface, the transmission speed can reach 480M/bps. The transmission speed of USB2.0 is 40 times that of USB1.1. Choosing USB2.0 interface will save you time in the future.
See if it uses Samsung (or modern) A-class chips. A-class chips can be repeatedly erased and written more than 1 million times, and the storage life is more than 10 years. And the performance is stable and the repair rate is low.
5. Watch the video:
Is there a realplay professional player, the speed of turning on and off, entering and returning to the menu; the formats that support video playback How much; whether the video playback is smooth, whether there are lags, screen blur, and out-of-sync between the picture and sound, etc.
6. Look at the attachment.
For headphones, look at the headphone head, whether the headphone cable is exquisitely made, and whether the charger has smart IC protection. Whether the current during charging output is above 650MA, the charger must also pass 3C certification to be safe.
Step 2: Listen
The sound quality of an MP3 MP5 is determined by two aspects. One: it is the solution adopted by the machine that plays a decisive role. The solutions currently on the market mainly include the following categories: philips, sigmatel, telchips, skylark, Rockchip, Huaxinfei, Ingenic, Taiwan Lingyang, Zhuhai Action, etc. The first four solutions are rarely used in the market. Currently, Rockchip, Actions, Huaxinfei, Ingenic, etc. are used in large quantities. Rockchip is currently used by high-end brands. Its advantages are that it supports APE/FLAC dual lossless The music format has good sound quality, the video screen can be turned on and off, the response speed is fast, the video playback is smooth, anti-static, the performance is stable, and the repair rate is low. Disadvantages: high price.
Second: The headphones provided with it also play a great role.
You can't tell whether a headphone is good or bad. You must listen carefully and carefully in person.
How to evaluate an excellent headphone?
First of all, you must look at the clarity of the headphone. , you need to listen to musical instruments, musical instruments, and human voices, just like the pixels of a camera, some are 8 million and some are 3 million.
The second point is to look at the three-band of the headphones. The high frequencies must be transparent. Delicate and bright, the mid-frequency is mainly about the human voice. First, the distance must be restored correctly. Second, the density of the mid-frequency must be good and the sibilance must be light. Like good headphones, the mid-range sounds basically great.
The third is low frequency. The low frequency should have good penetration, the amount should be moderate, and the amount should give people a sense of thickness. The low frequency should also have speed, and it should be fast and clean.
The third step is comparison
As the saying goes, you will know when you know the goods but not the goods. You need to compare with 3 companies. Then decide! Don’t just buy the expensive ones and not the right ones; It’s not just cheap ones, consider the ones with high cost performance and choose the one that suits you best.