How to judge car MP3 converter sound good or bad

Users to buy and install car MP3 / Car MP3 audio converter, its purpose is to enjoy the music. If there is no good sound quality, the user will waste time and money. We believe that the basic sound quality is good or bad depends on the following aspects:

1. MP3 sound quality

MP3 decoder chip used in its sound quality is good or bad depends on the key. Decoder chip is used in most high-end Philips SAA7750, or Sigmatel's ordinary STMP3410, related to the internal circuit design, welding process, circuit board materials, and so caused very different products from different manufacturers.

2. the quality of music files

Factors affecting the source itself is actually great. In turn depends on the quality of the source music file formats and compression ratio. Most mainstream music format is of course MP3, wma formats, and today almost all MP3 players are compatible with both formats. MP3 users should be considered the most current loss compression of digital audio formats, we generally listen to the MP3 files are 128kbps bit rate compression, the compression ratio is about 1:10, the file size to only 4M, above the volume and sound quality to a more balanced position. Our songs downloaded from the Internet are often relatively low compression ratio, often only 96kbps or lower, the effect is not very satisfactory. This is the site for download speeds there are copyright issues and specifically the practice of lowering the compression ratio. To enjoy the true sound quality, the best way is to find the quality of their better cd disc, their compression. In general, the compression ratio to 192kbps in the MP3 file, the sound quality is more of the good, playing with a good MP3 player, effects, and md's very close, if compressed to 320kbps, then sound quality is very close to the cd drive, it is generally difficult to differentiate them.

3. car MP3 / Car MP3 quality audio converter

Car MP3 / Car MP3 audio converter and car fm transmitter to create personalized music listening system plays an important role. If the center frequency of instability in audio converter, audio there will be noise; pre-emphasis circuit parameters do not match, the system will be affected the level of sound quality, can not reach the bass strong, powerful, human voice to restore the true, high-frequency field broad enough to rise and please the ears of the standard.

4. the quality of car FM stereo radio

Finally, the car FM stereo radio reception and quality of the entire PA system, sound quality. Different brands and price of the car's sound system is very different. A car the same, you can use to receive local FM radio stations to compare references.