Frequency response: (Music) 20hz-20khz-1db (microphone) 20hz-20khz-1db (bass) 30-200hz input sensitivity: (microphone) 11mv / 0775v (Music) 210mV / 0, 775v music tone + - 14dB microphone 15 segment equalizer + - 10dB Features: it adopts the most classic numerical control analog circuit technology, independently develops Dual DSP digital processing technology, microphone tone adopts 15 segment equalizer to adjust self-developed professional anti howling technology, such as short circuit, overload, over temperature, startup delay and other protection functions, such as music, microphone, effect boot volume setting and maximum volume locking function, startup music and microphone effect mode setting SMT chip production process, stable product performance, bass output volume can be controlled with the microphone switch to set the mute function, to prevent the impact of the post stage power amplifier