First of all, from the aspect of frequency matching, we all know that a speaker can only emit sound in a certain frequency range. Assuming that a four-inch coaxial speaker can emit a frequency of 20KHZ-5KHZ, that is to say it It is only possible to emit sounds within this frequency range, which is absolutely powerless above or below this range. The frequency range that the power amplifier can drive is also limited. There are power amplifiers that push the high-pitched speakers, and power amplifiers that push the bass.
The second point is whether the impedance matches. Different brands of different types of power amplifiers can withstand different impedance ranges, some can withstand 4 ohms, some can withstand 2 ohms, and some can withstand higher or lower impedance amplifiers. If the original amplifier design has a load impedance of 4 ohms and an 8 ohm speaker, its output power will be reduced by about half; when connected to a 2 ohm speaker, it will increase the power by about twice, some friends see here. It may be thought that if you connect several speakers in parallel to make its impedance smaller, can you drive a lot of speakers with just one amplifier? This view is no. Because the output internal resistance of the power amplifier cannot be infinitely small, and the internal circuit cannot supply enough current.
The third point is the matching of power. As mentioned above, the high-powered speaker can't be matched with the low-power amplifier. The reason is very simple. Assume that the continuous output power of the amplifier is 50W, and the continuous output power of the speaker is 100W. When the output of the amplifier exceeds 50W, the speaker has more power. It will be distorted, and at this time it is possible to generate an electric signal similar to DC. Even a small power DC can easily burn the speaker coil. The seriousness of the consequences can be imagined, so the scientific combination should be It is the continuous output power of the amplifier that is 1.25 times to 2 times the continuous output power of the speaker.
Misunderstanding 2: The matching of wires is that the thicker the wire is, the better the wire is. This is true, but one factor is neglected, which is the material used to make the core. There are many materials for making wire cores, among which copper is the most commonly used, and one layer higher than copper has pure copper and silver. How to measure the quality of wire? Very simple, the lower the damping coefficient, the better the wire, and the higher the conductivity, that is, the greater the amount of current allowed to pass per unit time, the better. A good wire can improve the sound quality, a large cross section, a large number of strands, and a small resistance audio line can improve the roundness of the sound, the sense of space and the positioning of the sound field.
Myth #3: The combination of the subwoofer and the cabinet. The bigger the volume, the better the better? The answer is no, the reasonable combination of the box and the horn is very important, not the bigger the size, the better. First of all, it should not be too big because of the condition of the compartment. The better the bass is, the better the bass is. The two are not proportional to each other. It is important to calculate the appropriate volume according to the formula according to the power, size and volume of the horn. Then, according to the calculated data, it is possible to create or purchase a suitable box, and not blindly. The pursuit of large-volume cabinets. On the contrary, some car owners prefer to choose a small-sized box because they are afraid of taking up valuable space. It is also unreasonable. The speaker needs enough space to exert its performance.
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