Diversity of stage sound-the pros and cons of full-range speakers and cross-frequency speakers PK

There are many kinds of stage sounds. As one of the major classifications of professional audio equipment, speakers seem to be simple in appearance, but the internal structure is not simple. According to the internal speaker structure, the speakers can be divided into full-frequency speakers and cross-frequency speakers.

A full-frequency speaker is a speaker made with only one full-frequency speaker, and there is only one speaker. A cross-frequency speaker is a high-frequency, middle- and low-frequency speaker that is separated by a crossover. The speakers range from 2 to N speakers.

In fact, it is impossible for a single speaker to cover all frequency bands. Generally speaking, full frequency is actually broadband. The range of sound that human ears can hear is 20 ~ 20KHz, so the frequency of sound is usually divided into high, medium and low frequency bands. The low-end of full-range speakers can generally reproduce sound within 150-15KHz, and the distortion is greater than this range; the mid-range speakers generally have better performance within 80-18KHz, and the full power distortion is> 5%; Coverage to 45-20KHz, full power distortion> 2%. The advantage of full-frequency sound is the use of point sound sources, so the phase is accurate, the sound of each frequency band tends to be consistent, and it is easier to bring a good sound field and level. The disadvantage is that the extension at both ends of the high and low frequencies is relatively limited, and the design and performance of each frequency band are constrained.

The multiple speakers of frequency-divided sound are processed separately with different frequencies. The advantage is that each frequency band is sounded by an independent unit, so each unit can work in the best state, and the extension of high and low frequencies is easier to do better. The disadvantage is that due to the different positions of the speakers, there is a color difference and a phase difference between the units, and the frequency division network introduces new distortion to the system. The sound field, knotness, separation, and gradation are all more susceptible, and the sound may deviate. The more frequency division, the higher the manufacturing process requirements of the speaker.

Therefore, the sound performance of full-range speakers is more natural, suitable for listening to human voices. The crossover speakers perform well in terms of high and low ductility, and can transmit sound with clear layers and rich sense of detail. Both types of speakers have their own advantages and disadvantages. It is not easy to judge which is better. The sound effects focused on different occasions are different. The type of speakers required is different. It must be judged according to the actual situation.