What are the tips for choosing a car audio power amplifier?

by:Gisen     2020-01-05
As an indispensable part of the car audio combination, the importance of power amplifier is self-evident. As a mobile concert hall, car audio has turned solitary travel into a kind of enjoyment. Regardless of whether it is a car audio enthusiast, the face of these metallic equipment will be deeply attracted by its unique magnetism. But perhaps for most people, how to buy satisfactory audio equipment is a difficult problem. Below we will introduce some tips in the power amplifier selection. Determining the same benchmark comparison power amplifier power is the most important parameter in the sound system, indicating the ability of the sound system to load. This is also the first thing we should pay attention to when buying. However, if each manufacturer uses its own different measurement criteria to identify product performance, it is often difficult to make an objective comparison without sufficient understanding. The same is true for power amplifier. When viewing the power amplifier power identification, you should pay attention to the following three points: first, the battery voltage. The voltage of the car battery is constantly changing. For two common signs: 14. 4 V/100 W and 12 V/100 W power amplifier are two completely different power descriptions. Since the voltage of the car during driving is basically about 12 V, the measured power value in the 12V voltage state is closer to the real situation. Moreover, the power amplifier, which identifies the power based on the continuous voltage of 12 V, can achieve greater power when it reaches more than 12 V. Second, harmonic distortion rate THD. When comparing the continuous output power of power amplifier, the same (Or closer)THD value. The difference in sound quality tested under different THD values is very obvious. Sometimes the maximum power of its logo is very high, but it is likely that its distortion and noise are also very high. Therefore, while checking the maximum power, you should also pay attention to the THD value identified. Third, the frequency range. The continuous power output of power amplifier should be detected within the frequency range it actually uses. For the power of power amplifier, it should be required to identify a complete detection range, and there is no point in identifying the power value at only a certain frequency. After determining the same benchmark, we can compare power amplifier power. In general, the principle of high-power output is generally followed when purchasing audio systems. The greater the output power of power amplifier, the stronger their ability to drive speakers. The power of power amplifier should be greater than the indicated power of the horn. If the selected power is too small, it will burn out easily when using high-power output for a long time, and will also lead to poor sound quality, distortion and other failures. The factors that high-quality power amplifier should have, of course, cannot better understand the quality of power amplifier by means of high-power text introduction. The high-quality power amplifier must also be able to quickly reflect the peak value of music signals, at the same time be able to correspond to powerful subwoofer and provide stable output in low distortion/low noise. To meet these requirements, you must have the following points: first, a power supply with excellent performance. This is the key to the sound quality of power amplifier. Its power supply department and amplification department should be designed separately to reduce noise. Large step-up transformers are used to increase the supply of stable current and large capacitors, which can react more quickly and supply the current required for amplification. Secondly, the built-in parameter equal converter. The car audio is very different from the home audio. The installation position of the speaker is very limited, and the sound adjustment is very important. In addition, due to the sound effect of the headrest and window and the sound wave confusion caused by the installation angle of the bass speaker, the sound effect of the car audio system will be improved. At this time, what works is the parameter equal converter, which can compensate the peaks and valleys of the sound waves caused by the above reasons and adjust a smooth sound field. Furthermore, it is the built-in divider. No matter how good the power amplifier's own functions are, when it is actually installed in the car, it will not be able to achieve the best results due to various audio problems and speaker configuration problems. In order to overcome these, in addition to the parameter equalizer, frequency divider is also used. The built-in divider has two major advantages: first, the system has scalability and can freely combine power amplifier with speakers. Second, make the adjustment simple and easy. This will improve the sound quality of the whole system. Due to the complicated wiring and easy mixing of noise, the external frequency division system requires a large space for installation and increases the price of the system, so we do not recommend it when selecting power amplifier for vehicles. To clarify the different uses of power amplifier, it is not enough to choose the simple parameters given by the manual. It should be determined according to the entire audio system, it is also necessary to listen to the opinions of other users or professionals and choose different models and brands of power amplifier according to different uses. According to different uses, it can be roughly divided into the following categories: 1. Power amplifier specially designed to push bass speakers: a secondary sound filter is built in, eliminating the external filter. 2. Power amplifier with equalizer: timbre can be adjusted according to personal preference or different compartment space. 3. 5-channel power amplifier: usually 2-channel or 4-channel power amplifier is used to push the front and rear speakers, while the bass speakers are pushed by another power amplifier, thus occupying too much area, with a 5-channel power amplifier, a power amplifier can solve the problem. 4. Multi-chip X-card Power Amplifier: the unique X-card provides a variety of sound separation options for power amplifiers: high pass, band pass, low pass, and even ultra-audio filters. 5. Electronic splitter modular power amplifier: these control modules allow you to select which signal will go to the power amplifier and RCA output to the power amplifier, and select the required frequency and sound separation point. By replacing the module, a power amplifier can be turned into a diversified power amplifier. Here, we only briefly introduce some common sense tips for selecting power amplifiers. To be practical, we must also use professional system design and installation to get a perfect sound system.
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