③为了避免在功率放大器这一个单元中产生削波失真,提高音色的质量,并保护音箱的安全,就要在音响系统选用功放时留有一定的储备功率。一般家用音响系统中,储备功率选在额定功率的2～4倍,所以家庭音响系统的音量控制旋钮通常应开在相当于时钟9～12点的位置,此时音量的响度就应该感到适度。一般音量控制旋钮都不要开到12点以上,也就是不超过1/2的位置。如果这个刻度还是推不动音箱,则说明功放功率不足。 ③ In order to avoid this unit in the power amplifier clipping distortion, improve the quality of the sound, and to protect the safety of the speaker, it is necessary to use the power amplifier sound system to reserve a certain reserve power. In a home audio system, the reserve power is 2 to 4 times the rated power, so the volume control knob of the home audio system should usually be on the position of 9 to 12 clocks, and the loudness of the sound level should be moderate. General volume control knob do not open to 12 o’clock, which is not more than 1/2 position. If this scale is still push the sound box, then the power amplifier power shortage.