With the continuous development and improvement of technology, the once-unattainable ultimate sound quality effect is no longer so far away, and even some relatively low-end low-end speakers can bring some good sound quality feelings. A good speaker can make the sound more sound. The truth 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 traditional two-way speakers, what are the advantages of three-way speakers? What should our ordinary consumers pay more attention to when purchasing speaker products?
The second frequency divider is composed of a high-pass filter and a low-pass filter, and the third frequency divider has added a band-pass filter, because the filter exhibits a certain slope with a certain slope near the frequency divider Attenuation characteristics, in theory, the greater the attenuation rate of the filter, the better. This is because the intersection of adjacent attenuation counties is called a crossover point, and there is an overlapping frequency band near the crossover point. In the frequency band around the loan point, there will be two speakers sounding together. When the speaker response is smooth, the attenuation characteristics of the crossover are also ideal. The greater the single attenuation rate, the more components, the more complex the structure, and the more difficult the adjustment.
Three-way frequency is suitable for home theater, and two-way frequency is suitable for listening to music. In fact, the sound quality of a unit's full-range speaker is the best because there is no phase distortion. The premise is that the speaker quality is better.
The characteristic of the two-way speaker is that a speaker unit is responsible for outputting midrange and bass at the same time. The advantages are low cost and simple crossover (the function of the crossover is as the name suggests, which section of sound is assigned to which unit speaker) The volume is small, the power thrust of the power amplifier is small, and the performance of the music is relatively focused. The general bookshelf boxes are two-way speakers. The disadvantage is the lack of layering in the sound. Because of the need to take into account the mid-bass, the unit cannot be made too large, which affects the performance of low frequencies. The low frequencies are not very satisfactory, and the sound field (the ability to restore the recording environment) is also too limited. What do you think of such a small unit? Restore an environment where dozens or hundreds of people are playing ~~
The characteristics of the three-way speakers are of course that the three speakers each perform their own duties, respectively representing high and low bass, the advantage is of course a strong sense of hierarchy, high and low in place, low frequency speakers can be large, low frequency performance is of course good, low frequency extension dive is good The sound field is also wide, which is the ideal state of the speaker, but it is costly, the quality of the frequency divider is harsh, the frequency divider has many components, and the volume of the speaker is large.
Theoretically, the two-way crossover has a simple structure, smaller volume, and lower cost than the three-way speaker, but the disadvantage is that the sound level is insufficient. The three-way high-medium-low-frequency transition is more peaceful, but the requirements for the crossover are more stringent, the quality and technical requirements of the crossover are higher, and the cost is naturally higher.
The frequency divider by two is composed of a high-pass filter and a low-pass filter. A third pass adds a bandpass filter. The filter exhibits an attenuation characteristic with a certain slope near the crossover point. The crossover point of the adjacent curve's decaying phase is usually called the crossover point. There is an overlapping frequency band near the crossover point. In this band, both speakers have output. Theoretically, the greater the attenuation rate of the filter, the better. However, the greater the attenuation rate, the more components, the complex structure, the adjustment is difficult, and the insertion loss is also greater. Commonly used -6dB and -12dB frequency divider. In the commonly used -12dB / octave frequency divider, the horn still has considerable energy in the octave band outside the crossover point; in the 1.5 octave band, the speaker sound is still audible. In this way, in a fairly wide band near the crossover point, two speakers will sound together. If the response of the horn is smooth and the attenuation characteristic of the crossover is also ideal, then this transition process will also be smooth; but if the peak and valley of the horn response appear, or the complementarity of the crossover is not ideal, then This transition process will oscillate, and in severe cases, the audio and video will be in chaos.
For the same reason, the three-way speaker will have two transitions. It is especially important to note that the two transition processes must not be allowed to overlap, otherwise the consequences will be unimaginable. Although the frequency division of the violin tends to be ideal, a master will try to avoid the remaining homophonic resonance when playing the violin in order to obtain a more pure sound effect. Therefore, in the case where the two-frequency division can meet the coverage of the playback frequency, do not use the three-frequency division. In general, if the upper limit of the playback frequency of the woofer reaches 6 kHz, it is not necessary to use the midrange unit. For example, the playback frequency range of a top-grade 10-inch woofer is 30 Hz to 60 kHz, and the playback frequency range of a top-grade tweeter is 1.5 kHz to 20 kHz. In this case, it is good to use a combination of two crossovers. The crossover point Optional at 3kHz. If you insert another mid-range unit with a replay frequency upper limit of 8 kHz, there is no need for it. One more crossover point will cause more distortion, and the cost will increase a lot. The more crossovers, the more difficult it is to select speakers . The gains and losses are obvious.
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