目前,大多数功放在设计上采用AC电压负反馈方式,这种设计方式的缺陷是易导致低频功率跌落,引入附加相位,使信号出现迭加失真,声音混淆不清,层次感、清晰度下降。其中,低音的重放效果特别不尽人意,为恢复扣人心弦的低音效果,笔者用STK3048、STK6153制作的直流功放板制作了有源超重低音放大器,收到意想不到的效果。 At present, most of the power amplifiers are designed with AC voltage negative feedback. The disadvantage of this design method is that they easily lead to low-frequency power drop, introduce additional phase, make the signal appear superimposed distortion, the sound is confused, the sense of hierarchy is degraded . Among them, the bass playback is particularly unsatisfactory, in order to restore the exciting bass effect, I made with STK3048, STK6153 DC amplifier board made active overweight bass amplifier, received unexpected results.