【 Weak current College 】 speaker indicator---Power By 【 China power house network 】

A, rated impedance and bile on characteristics of rated impedance loudspeaker system is usually adopted for the rated impedance loudspeaker unit. Speaker system impedance characteristics than the impedance loudspeaker unit more complicated. This is because the speaker system with a wide variety of speaker units and a crossover network. The impact of the box, so that the whole speaker system impedance characteristics as the structure, the unit and divider and produce a large change.

Second, the distortion of the distortion characteristics of loudspeaker system, complex than a single speaker, it is composed of parts of the speaker system of the distortion synthesis, these sections include: composition system each speaker is distorted; tinei in sweep wing Vibration-induced distortion crossover network resulting distortion, etc.

Thirdly, the rated frequency range, effective frequency range speaker system replay rated frequency range from product standards, the speaker system actually achieved frequency range called effective frequency range. Ideally, the speaker system of the human ear can hear frequency range 16 ~ 20000Hz, practical, and general design in the frequency range of 40 ~ 20000Hz.

4. characteristics of the sensitivity level, maximum output sound pressure level speaker system features like sensitivity level and speaker at 1W input conditions, in accordance with the national standard GB9396-88 (test standards), GB9399 a 88 (technical standards) in the speaker Office 1M measured sound pressure DB sensitivity by characteristics on the basis of the number of levels you can calculate the speaker system of large output sound pressure level.

5. rated maximum noise power, rated long-term maximum noise power speaker system rated maximum noise power at nominal frequency range-fed to the speaker system to provide simulation program, but does not produce heat and mechanical damage of maximum noise voltage.

6. pure tone speaker system checked to be without mechanical noise, touch the ring tone, garbage, dual tone, etc.