Advantages of three-way speakers
The speaker is a key part of the speaker system (commonly known as the speaker). The sound quality of the speaker is mainly determined by the performance indicators of the speaker, which in turn determines the entire set of sound indicators. The performance indicators of speakers mainly include rated power, rated impedance, frequency characteristics, harmonic distortion, sensitivity, directivity, etc.
The performance of the speaker is mainly measured by the following indicators:
1. There are many kinds of distortion of rated power (W)d speakers, common harmonic distortion (mostly caused by the uneven magnetic field of the speaker and distortion of the vibration system, often produced at low frequencies), intermodulation distortion (due to two Signals of different frequencies are added to the speaker at the same time, and the sound quality caused by mutual modulation is degraded) and transient distortion (because the inertia of the vibration system cannot change immediately after the signal changes, causing signal distortion). Harmonic distortion refers to adding harmonic components that are not in the original signal during playback. The harmonic distortion of the loudspeaker comes from non-linear distortions such as the uneven magnetic field of the magnet, the characteristics of the diaphragm, and the displacement of the voice coil. At present, the harmonic distortion index of better speakers is not greater than 5 [%].
2. Sensitivity (dB/W) The sensitivity of the loudspeaker usually refers to the magnitude of the sound pressure measured at 1m from the front of the loudspeaker when the input power is a noise voltage of 1W. Sensitivity is a measure of whether the speaker can reproduce the details in the audio signal in great detail. The higher the sensitivity, the loudspeaker can respond to all details in the audio signal. The sensitivity as a Hi-Fi speaker should be greater than 86dB/W.
3. Directivity The sound pressure frequency characteristics of speakers radiating in different directions are different. This characteristic is called the directivity of the speakers. It is related to the caliber of the speaker. When the caliber is large, the directivity is sharp, and when the caliber is small, the directivity is wide. Directivity is also related to frequency. Generally speaking, for low-frequency signals below 250 Hz, there is no obvious directivity. It has obvious directivity to high-frequency signals below 1.5kHz.
