The frequency response of the PA loudspeaker means that under the influence of the effective frequency uniform power, the sound frequency of each frequency given by the broadcasting system is often implied in the form of "80~1600HZ, about 3dB", and it is also implied by the frequency response curve.
The loudness of the speaker refers to the sound pressure level given by 1W of electrical signal power input on the speaker and 1m away from the axis of the speaker, and the unit is implied by dB. Loudspeakers with high flexibility are easy to push, but the dynamic range will decrease; on the contrary, speakers with low flexibility are not easy to push, which will cause waste of power.
The impedance of the speaker refers to the value that matches the impedance of the power amplifier. The broadcast system can use a multimeter to measure the approximate impedance at both ends of the speaker. Speaker impedances are 4 amps, 6 amps, 8 amps, 16 amps, etc.
The speaker has the same directivity as the microphone, which indicates the distribution environment of the sound around the speaker when it is working. The loudness of the sound heard at different angles away from the central axis of the speaker is not equal. The higher the frequency of the sound, the greater the directivity. Strong, the loudness on both sides is weaker.
The distortion degree of the speaker refers to a certain difference between the playback and the original sound. The phenomenon implied by this difference in the broadcasting system is distortion. The distortion of the speaker mainly refers to the loss of linearity distortion. Generally, the distortion degree of the speaker should be less than 5 %, which will have a certain impact on the sound quality of the speaker.
