Divider and crossover point choice Foundation

In a speaker system, people put the box body, the frequency circuit, speaker unit called a three-piece speaker system, and crossover circuit on speaker system restore can be high quality electro-acoustic signals plays an extremely important role. In particular, in part, in, high-frequency crossover circuit the effect is even more obvious. Its role is as follows: reasonably split each unit of work in the band; reasonably to the power distribution unit; the unit has a proper phase relations in order to reduce the unit in the work of the distortion sound interference; use frequency circuit of characteristics to make up for the unit in a frequency band in the sound and defect; the band and butt up and smooth ride. Clearly, the role of these crossover circuit has been recognized and accepted. Crossover point selection: 1. Considering the low unit directivity and practical boundaries frequency f = 345/d (d = unit diaphragm effective diameter). Usually 8 "cell border frequency 2 k, 6.5 border frequency" unit for 2.7k, 5 "unit cell" 4 3.4k, as used above 4.3k. in other words, the crossover point unit cannot be greater than the element corresponding to a frequency of practical boundaries. 2. from the treble unit resonant frequency, frequency point should be greater than three times the resonance frequency. In other words from the viewpoint of the treble unit, usually the crossover point should be greater than 3.2.5k. Consideration the bass unit high-end fractional frequency response Fh, usually point should not be greater than 1/2 Fh. Indeed, the second frequency speakers above conditions are less likely to be met simultaneously. When designers should the three has a better compromise choice. But it must be stressed that the first condition that is practical boundaries frequency should give priority to meet. 4. the frequency of cases, typically should be two crossover point separates the farther (which should be in three octaves above), the combination of system response will become better. Otherwise, there will be interference radiation phenomena of complex. 5. the bass and tenor of the crossover point should consider people sound like positioning. Should enable the voice of replay unit by the Alto as possible, to avoid the human voice sound like positioning the timbre of the major changes have occurred. It is often easy to overlook the designer. Usually this crossover point should be 200-300Hz.