What about the poor sound quality of car audio? How to improve the effect of car audio
Improving the sound quality of car audio is an overall process. Firstly, when establishing the audio system, the matching and material selection of various equipment should be basically consistent in style, otherwise it may cause disharmony in appearance, function and indicators, so it is difficult to improve the sound quality to a higher level. To improve the sound quality of car audio, try to choose CD and DSD lossless audio as the sound source; Want "original" not equalizer; High power should be used to avoid distortion; The smoother the frequency response curve, the better.
Six factors of car audio quality appraisal
1. Clarity. The wonderful sound quality level is very clear and transparent, and every word can be heard clearly
2. Fullness. The middle and bass are sufficient, the treble is moderate, warm, comfortable and elastic. If the reverberation time is too short, especially the reverberation time in the low frequency band is shorter than that in the medium frequency band, its fullness will not be very good; The output frequency characteristics of the sound system are poor and lack of bass, so the sound will appear shriveled and weak, not to mention plump.
3. Intimacy. It is what people usually call vivid, that is, there is a sense of communication and talk in the sound they hear. The average or poor sound quality can't realize this effect. It will make you feel urgent and distant.
4. Sense of balance. It refers to the proportion coordination and correct phase of the output power between the left and right speakers, the main speaker and the auxiliary speaker. The left and right channels of stereo have good consistency and sound image is normal. If the sound and image are sometimes offset and not coordinated enough, it is not good sound quality.
5. Sense of environment. The sound has a good sense of space and gives people a realistic feeling. It is most appropriate to describe good sound quality with immersive experience.
6. Loudness. In terms of loudness, good sound quality sounds appropriate and comfortable. In particular, it is more advantageous to choose excellent sound source as the program source for audition when distinguishing sound quality, and to choose familiar content for test.
How to improve
1.It's better to choose CD and MD for the host instead of VCD and MP3. If there are no conditions, You can choose a multimedia host (usually with navigation function), or add a DSP. The sound quality of the low-end original host is poor. You'd better not use it. Ape belongs to the compressed format. Although many original host computers now support playing music in ape format, the overall effect is still not as good as the sound quality of CD. The CD should choose a model without any modification to the signal, that is, the so-called "original flavor" . Because the modified signal is not the original waveform and has been distorted, the music played is not ideal. If you use the host to directly push the speaker, you should choose the one with high output power. At present, the output power of most CD hosts is generally 4 * 50W. If the front output of the host is used, the one with high output level shall be selected in order to improve the signal-to-noise ratio. The output level is generally 2-4v. By the way, CD records should be authentic. It's best to use HQCD printed on the disk. The sound quality produced by this kind of CD records is very good. If there is no condition to choose genuine CD, you should also choose the sound source supported by the host and as excellent as possible. Don't excessively pursue fancy functions, as long as the functions of the equipment can meet your listening needs, but don't be greedy for cheap and miss the basic functions you need. Users of the input and output ports of the equipment should consider in advance, which are necessary and which are optional, so as to avoid inconvenient upgrading and use in the future.
When selecting speakers, you should first consider your favorite style and match them according to the system.
The sound quality types include classical music, symphony, light music, etc. speakers with clear sound quality, strong analytical power and soft sound should be selected. The types of sound pressure type (i.e. blaster) include:, DJ,, rock, etc. speakers with firm structure, large dynamic range and high output power shall be selected. If the host is used to directly push the speaker, the speaker that matches the output power of the host shall be selected. Generally, the speaker with high sensitivity (usually above 92dB) shall be selected for easy promotion. If the loudspeaker driven by power amplifier is selected, high-power loudspeaker shall be used. This kind of loudspeaker has large dynamic range, solid foundation and full sound. In addition, speakers are divided into coaxial, split, single voice coil, double voice coil, etc. The latter is usually used for subwoofers. The split loudspeaker is most used in the front door of the vehicle, because the split loudspeaker separates the treble and mid bass, which is convenient for installation and sound field positioning. The split loudspeaker has a distributor and has the function of treble attenuation, which is convenient for adjusting the treble intensity.
3. Matching between power amplifier and loudspeaker
The power amplifier must be adapted to the loudspeaker, and impedance matching is the most important. The loudspeaker is the main load of the power amplifier, and the nominal (or rated) impedance of the loudspeaker shall be equal to or close to the rated output impedance of the power amplifier. How much rated load impedance should be connected to the power amplifier circuit is a basic parameter for the manufacturer to design the power amplifier. The transistor low impedance output power amplifier still puts forward certain requirements for the load impedance value. For example, the output load of the original design power amplifier should be 8 ohms, which is an ideal power amplifier circuit. When it is equipped with 16 ohm speaker, its output power will be reduced by about half, while when it is equipped with 4 ohm speaker, the output power will be doubled. However, most power amplifiers are not ideal, their output internal resistance can not be infinitely small, their amplification loop can not provide enough current gain, and the regulated power supply can not provide enough working current. When this power amplifier is connected to the speaker with low impedance, the transient characteristics will deteriorate and the degree of distortion will increase. It should have greater power output, but the success rate value can not go up. For the power amplifier with external 4-16 ohm load, try to connect it to the loudspeaker in the middle of the impedance range. When the power amplifier is connected with a loudspeaker whose load impedance is higher than its rated load impedance, the rated output power decreases and has little effect on other performance indexes; However, if the power supply voltage margin is small, it may still show that overload distortion has occurred when reaching the intended rated power.
4. Difference of loudspeaker sensitivity
It has a significant impact on the requirements of speaker driving power. When the sensitivity of the loudspeaker is reduced by 3dB, in order to reach the same sound intensity, the output power of the power amplifier needs to be doubled. For example, the sensitivity of the loudspeaker is reduced from 90dB / w / m to 87db / w / m. The original 50W power amplifier should be increased to 100W. Similarly, if the loudspeaker produces the same sound pressure level, the driving power should be increased by 16 times; In other words, if a 160W power amplifier is used to drive a 83db / w / M loudspeaker, a 10W power amplifier is required to drive a 95dB / w / M loudspeaker, which can produce the same sound pressure. It can be seen that when the sensitivity of the loudspeaker is different, the required driving power is different; The speaker with high sensitivity can use less driving power to obtain the required volume. In the matching of audio equipment, the sensitivity adaptation of speakers is very important
5. Timbre adaptation
Timbre adaptation is also particularly important. The timbre of power amplifier and loudspeaker must be matched with each other to obtain the replay timbre loved by users. The timbre of equipment is subjective. Different people like different timbre. Personality, hobbies, cultural cultivation and experience all affect the listener's preference for timbre. Due to the different historical changes and national cultures in different countries, the audio equipment in different countries also have different timbre characteristics. For example, British speakers sound warm and sweet, German speakers are cool and gorgeous, French speakers are beautiful and luxurious, Danish speakers have a strong taste of music, and American speakers are sharp and bright.
Post time: May-12-2022