One, some sounds take time to confirm his performance, and this time process varies from tens of hours to tens of days depending on the speaker.

2. Small bookshelf audio Due to physical factors, the bass extension of the small bookshelf audio is low, because the dynamic range of the bass is not too large, which is of little practical significance.

3. Public broadcasting equipment, the sound engineering installation company said that the nominal impedance of the sound is commonly 4ω and 8ω. Although the 4-impedance speaker can make the power amplifier output more power, the low-impedance power amplifier has a higher output current capacity, and for some power amplifiers with small power margins, it often causes distortion to expand. And low-impedance speakers are not conducive to damping, and will affect low-frequency control. In addition, in actual operation, the impedance of some speakers may be reduced to less than half at certain frequencies, so you can choose speakers with an impedance of 8Ω. (For example, many AV amplifiers cannot have a load impedance lower than 6 OHms.

Public broadcasting equipment engineering

Fourth, the double line. If the terminals are in parallel, the speaker cable needs to be connected to a pair of terminals in the lf unit. Otherwise, due to the parallel connection of two sets of terminals or copper sheets, the effect of low frequency reproduction will be largely lost. public address system equipment

5. The dumbbell tone adopts two identical medium and low frequency speaker units, which are symmetrically arranged on both sides of the high frequency unit. It can obtain good low frequency and transient response, high sensitivity and power carrying capacity, and large dynamic nonlinear distortion. However, its comprehensive frequency characteristics in the mid-band often produce troughs and narrow vertical directivity, so attention should be paid to the mid-band performance. But in some dumbbell speakers, the next unit is only used for reproducing low frequencies, and reproducing low frequencies on the unit, the so-called 2.5 frequency, can overcome the above shortcomings.