With the continuous development and improvement of technology, the ultimate sound quality that was once unattainable is not so far away. Even some low-end speakers with relatively cheap price can bring some good sound quality feelings. Good speakers can make the sound more Reality is also rich in the details of the sound. However, with the continuous development of technology, a three-way speaker appears in front of people. Compared with the traditional two-way speaker, what are the advantages of the three-way speaker? What should our ordinary consumers pay more attention to when purchasing speaker products? The divide-by-2 is composed of a high-pass filter and a low-pass filter, and the third-divider adds a band-pass filter because the filter exhibits a slope with a certain slope. The attenuation characteristic theoretically requires that the attenuation rate of the filter is as large as possible. This is because the intersection of the fading phase in the adjacent district is called the frequency division point, and there is an overlapping frequency band near the frequency division point. In the frequency band of the loan near the point, there will be two speakers together to make a sound. When the speaker response is smooth, the attenuation characteristics of the frequency divider are also ideal. The larger the single attenuation rate, the more components and the more complicated the structure, the more difficult the adjustment. The three-way is suitable for home theater, and the two-way is suitable for listening to music. In fact, a unit's full-range speaker has the best sound quality because there is no phase distortion. The premise is that the quality of the speakers is better. The two-way speaker features a speaker unit that is responsible for outputting the midrange and bass. The advantage is that the cost is low and the frequency divider is simple (the role of the frequency divider is as the name, which part of the sound is assigned to which unit speaker). The size is small, the power thrust requirement of the power amplifier is small, and the performance of the music is relatively focused. The general bookshelf box is a two-way speaker. The disadvantage is that the layering of the sound is insufficient. Because the middle and low bass should be taken care of, the unit can't be too big, which affects the performance of the low frequency. The low frequency is not very satisfactory, and the sound field (the ability to restore the recording environment) is also limited too much. How do you want such a small unit? Restore an environment where dozens of people play ~~ The characteristics of the three-way speaker are of course three horns each performing their own duties, respectively, high and medium bass, the advantage is of course strong layering, high and low low, the low frequency speaker can be bigger, the low frequency performance is of course good, the low frequency extension dive is good The sound field is also wide, which is the ideal state of the speaker, but it is high cost, the quality of the crossover is harsh, the crossover components are many, and the speaker is large. In theory, the two-way crossover is simple in construction, smaller in size, and lower in cost than the three-way speaker, but the disadvantage is that the sound level is insufficient. The three-way high-frequency low-frequency transition is more peaceful, but the crossover requirements are more demanding, the quality and technical requirements of the crossover are higher, and the cost is naturally higher. The divide-by-2 is composed of a high-pass filter and a low-pass filter. A three-way frequency band adds another bandpass filter. The filter exhibits a certain slope attenuation characteristic near the crossover point. Usually, the intersection of adjacent curves and decay phases is called a crossover point. There is an overlapping frequency band near the crossover point, in which both speakers have outputs. Theoretically, the greater the attenuation rate of the filter, the better. However, the larger the attenuation rate, the more components, the complicated structure, the difficulty of adjustment, and the greater the insertion loss. A frequency divider of -6dB and -12dB is commonly used. The commonly used -12dB/octave crossover has a considerable amount of energy in the 1 octave outside the crossover point; while in the 1.5 octave, the speaker's sound is still audible. Thus, in a relatively wide frequency band near the crossover point, the two speakers will sound together. If the response of the horn is smooth and the attenuation of the divider is ideal, then the transition will be smooth; but if the horn responds to peaks and valleys, or if the complementarity of the divider is not ideal, then This transition process will oscillate, and in severe cases, the audio and video will be chaotic. By the same token, there will be two transitions in the three-way speaker. In particular, it is important to never overlap the two transition processes, otherwise the consequences will be disastrous. Although the crossover of the violin tends to be ideal, a master will still try to avoid the only homophone resonance when playing the piano, in order to obtain more pure sound. Therefore, in the case where the two-way frequency can satisfy the reproduction frequency coverage, do not use the three-way frequency. In general, if the upper limit of the playback frequency of the woofer reaches 6 kHz, it is no longer necessary to use the midrange unit. For example, the playback frequency range of a top 10 inch woofer is 30 Hz to 60 kHz, and the playback frequency range of a top tweeter is 1.5 kHz to 20 kHz. At this time, it is good to use a two-way combination. Available at 3kHz. If you insert a midrange unit with a maximum playback frequency of 8 kHz, it is unnecessary. One more crossover point will have more distortion, and the cost will increase a lot. The more the frequency division, the more difficult it is to select the horn. . The gains and losses are obvious.
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