Guide to matching car audio equipment

Guide to matching car audio equipment

Among many car audio technologies, equipment matching is an important link, and it is also a matter of great concern to car audio enthusiasts and enthusiasts. Then, the following is a guide to the matching of car audio equipment compiled by me for everyone. Welcome to read and browse.

1. Clarify the needs and purposes of the owner's modification

I often see the owner asking related questions on the Internet, such as I am a XX car and want to change a set of stereo. Some models are not even clearly introduced, let alone their favorite music styles. For such a car owner, he will be asked several related questions. For example: What model is yours? What are you not satisfied with the original car stereo? Which singers do you usually like to listen to? And the general cost budget and so on. Only after understanding these general conditions can we recommend the appropriate car audio system to the car owners more pertinently. And this information is the premise of matching a sound system.

2. Recommend audio equipment according to the owner's listening habits

Of course, everyone has his own listening habits and hobbies, and music is very personalized. For example, some people like heavy metal percussion and rock music, but others like the fresh and tranquil pastoral classical melody. Therefore, if you want to match a car audio system that meets the needs of car owners, it is important for you to have a deep understanding of the sound styles of various brands and listen to your feelings and experiences.

as we all know, most American stereos belong to? Power type? Strong, dynamic, free and easy, rough and generous, suitable for listening to rock and heavy metal percussion. American-style audio is widely favored by the younger generation in China. And most European stereos belong to? Classical? , the timbre is soft and warm, suitable for classical and string performance; The shape is dignified and elegant, flashy but not gorgeous, giving people a sense of art. Japanese audio belongs to? Electronic type? Their biggest feature is that they often pay attention to the parameters of electric steam, but don't pay much attention to music performance. As an up-and-coming domestic car audio, although it started late, many factories have devoted themselves to research for many years. Through market information feedback, it is found that the products developed and promoted by it have won the recognition and love of car owners.

There are many brands of car audio products. In order to explain them more concretely, let's take the Leibeiqin brand as an example. Among Leibeiqin's numerous set speakers, RV6A is a classic 2-frequency set speaker with rated impedance of 4 ohms, normal power of 7 watts, and frequency response of 55 Hz to 2 Hz. The middle and bass unit adopts a voice coil with a diameter of 3mm, and the sound basin is made by the loose-pressing molding process with mixed pulp of coniferous plants in cold zone. This kind of loose-pressing sound basin has better internal damping characteristics, better rigidity and lower distortion than the common compact-pressing sound basin.

The reason why this loudspeaker is described in detail is that the material of the loudspeaker determines the sound characteristics, and the loudspeaker occupies such a heavy weight in a sound system, so it is of course very important to deeply analyze the loudspeaker. According to the characteristics of the horn, the matching power amplifier will have better performance if it is equipped with a power amplifier with thick sound performance. This kind of collocation tends to be warm in timbre performance, and the requirements for sound source (CD host/DVD host) are reduced. Choosing a pioneer or a song host makes the timbre more warm, while choosing an Alpine host makes the timbre more neutral. Therefore, mastering the characteristics of power amplifier and speaker makes it easier to get the desired effect when matching equipment. The combination of the above power amplifiers and speakers, if the sound source is matched with music D2, the sound performance: high-pitched and soft; Warm timbre; Good control; Good listening compatibility, especially suitable for listening to jazz and pop music.

as a car audio enthusiast, it is also very important to have a deep understanding of all kinds of equipment after having a general understanding of the brand style of audio.

3. Reasonable collocation of speakers, power amplifiers and other equipment

The style of a car audio system mainly depends on the speakers, followed by the influence of the power amplifier. If the CD host and the wire are evaluated together, the experimental value of the position ratio between them is: sound source: power amplifier: speaker: wire = 2%: 25%: 5%: 5%, which shows the importance of the speaker (horn) in the sound system.

what needs to be explained here is that the description of the wire rod is such a proportional value, which means that the wire rod quality used is as written above as long as it can meet the national standard, not for those special wire rods that sell for thousands of yuan at a time, but the sound performance effect is unclear and unclear to the parties concerned. In addition, it is worth noting that in addition to the above factors, the car audio system should also consider the impact of the car's own acoustic environment. Therefore, the collocation of car audio system is much more complicated than that of home audio system. Secondly, the matching of audio equipment also has the matching of electrical parameters, such as impedance matching of power amplifier and speaker, power and efficiency matching; The matching between the output impedance of CD host and the input impedance of power amplifier, etc., all these details will affect the normal play of the system. If you mix them at will, the effect will be neither fish nor fowl, but the equipment will be damaged.

It is found that many car audio enthusiasts are concerned about the power matching between speakers and amplifiers (hosts), and there are different opinions on this issue. Some say that the rated power of the power amplifier must be greater than or equal to the rated power of the horn in order to push the horn; Others say that the rated power of the power amplifier must be more than 3% of the rated power of the horn, and some even say that it is more than 2 times, so as to push the horn well, otherwise the horn may be burned when it is in a big dynamic state; As far as I know, some stores say that even if the rated power of the amplifier is less than the rated power of the speaker, it still works well. Let's leave the above statement aside for the time being. Let's take a look at the physical meaning of the rated power of the speaker and the amplifier first.

for power amplifiers, the rated power generally refers to the effective (RMS) power that can be continuously output. For speakers, rated power means that the speaker can withstand this amount of power for a long time without being damaged.

from the analysis of the above two points, it is not necessary for the rated power of the power amplifier to be greater than (equal to) the rated power of the speaker. The difficulty of driving a horn is mainly determined by its sensitivity and impedance characteristics. Just like people eat, you could have eaten three bowls of rice, but once you ate four bowls, it didn't mean you would be crushed to death. With the power amplifier whose output power is less than the rated power of the horn, as long as the volume is not blindly increased (of course, many car owners don't quite understand this truth, so there are frequent accidents of horn burning), and the power amplifier is controlled within the linear working range (no clipping distortion), there will be no accidents of horn burning; The same high-power amplifier can match the low-power speaker. As long as the maximum working power of the amplifier is controlled within the range that the speaker can bear, the speaker will not be damaged by overload. Therefore, in order to protect the equipment, the most important thing is that Andhadhun must set the input sensitivity GAIN of the power amplifier when adjusting.

However, if you want to find out the best sound quality performance of speakers and amplifiers, I suggest that the rated power of amplifiers should be slightly higher than that of speakers, so that the power of amplifiers is slightly surplus, which can better cope with dynamic music signals. Because the peak voltage (current) of music signal is very high in large dynamics, it is easy to make the power amplifier enter the nonlinear region and deteriorate the sound quality. So is it better to choose a higher power amplifier? The answer is not necessarily, because the fineness of high-power power amplifier is difficult to do well, which is a difficult problem for designers, and we will not discuss it here. What is certain here, but in terms of cost, the greater the power, the higher the cost.

4. Whether to add bass

When the power amplifier and speakers are selected for a sound system, many masters or car owners who have higher requirements for music often feel that something is missing. Yes! This involves the question of why the subwoofer should be installed.

why should a car stereo have a subwoofer system? As we all know, the frequency range of sound that human ears can hear is about 2Hz (extremely low frequency) to 2 Hz (extremely high frequency). Generally, it is not a problem that the tweeter can extend to 2 Hz in the configuration of multi-channel car audio speakers. For low frequencies, 5-inch and 6-and-a-half-inch monomers, due to the limitations of their horn basin area and working stroke, if they can play the extremely low frequency of 6Hz in the car, it will be very remarkable.

how does music sound without frequencies below 1Hz? Anyone who has experience in listening to music knows that the bass dry bar and drums are thin and weak, lacking strength and percussion texture, and the breadth and extension of the whole sound stage are obviously limited. Therefore, don't underestimate the short frequency band from 2Hz to 1Hz, without the music of these two octaves and the contrast of the scene, it just sounds imperfect.

in order to make up for the extremely low frequency that ordinary bass speakers can't perform, we need to install the so-called subwoofer, subwoofer or ultra-low speaker in the car, so that the music can be perfectly interpreted in the extremely low frequency domain! ;