Car audio modification as a mobile concert hall turned lonely travel into a pleasure.
Whether it is a car audio enthusiast, facing these metal-filled equipment will be deeply attracted by its unique magnetic.
But for most people, how to choose a satisfactory audio equipment is a problem, especially the choice of power amplifier, the requirements are also very high.
So how do we choose the right amplifier?
Car audio conversion, choose the right amplifier is the most important!
The following small series will introduce you to some tips in the selection of amplifiers:
Determine the same reference to compare the power of the amplifier
Power is the most important parameter in the sound system and represents the ability of the sound system to carry loads. This is also the first place we should pay attention to when purchasing. However, if each manufacturer uses different measurement benchmarks to identify product performance, it is often difficult to make an objective comparison without sufficient knowledge. The same is true for power amplifiers. Pay attention to the following three points when viewing the power amplifier's identification:
First, the battery voltage.
The voltage of the car battery is constantly changing. For the two commonly used tags: 14.4V/100W, 12V/100W, the power amplifiers are completely different power specifications. Since the voltage of the car during driving is basically around 12V, the measured power value at 12V is closer to the real situation. Moreover, the power of the identification power with a continuous voltage of 12V can achieve greater power when it reaches 12V or more.
Second, the harmonic distortion rate is THD.
When comparing the continuous output power of the power amplifier, it should be performed at the same (or closer) THD value. The difference in sound quality tested under different THD values ​​is very obvious. Sometimes the maximum power of the logo is high, but it is likely that its distortion and noise are also high. Therefore, when checking the maximum power, you should also pay attention to the THD value it identifies.
Third, the frequency range.
The continuous power output of the amplifier should be tested within the frequency range in which it is actually used. For the power of the power amplifier, it is required to identify the complete detection range. The power value does not have any meaning when only a certain frequency is identified.
After determining the same benchmark, we can compare the power of the amplifier. Generally, the principle of high power output is generally followed when purchasing an audio system. The greater the output power of the amplifier, the stronger their ability to drive the speakers. The power of the power amplifier should be greater than the indicated power of the horn. If the power used is too small, it will easily burn out when using high-power output for a long time, and it will lead to faults such as poor sound quality and distortion.
Defining the different uses of the amplifier
It is not enough to choose the simple parameters given by the manual only according to the manual. It should be determined according to the whole sound system. It is also necessary to listen to the opinions of other users or professionals, and select different models and brands of power amplifiers according to different purposes. According to different purposes, it can be roughly divided into the following categories:
1. Amplifier specially designed to promote the woofer: Built-in infrasound filter eliminates the need for an external filter.
2. Amplifier with equalizer: The tone can be adjusted according to personal preference or different compartment space.
3.5-channel power amplifier: Usually use 2 channel or 4 channel power amplifier to push the front and rear speakers, the woofer is driven by another power amplifier, so the occupied area is too large, and using 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 crossover options for power amplifiers: Qualcomm, Bandpass, Lowpass, and even Super Audio.
5. Electronic Splitter Modular Power Amplifiers: These control modules let you select which signal will go to the power amplifier and to the RCA output of the power amplifier, selecting the desired frequency and the point of the split. By replacing the module, one power amplifier can be used as a diversified power amplifier.
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