BA7725S
Overview
- 1) Internal logarithmic 1 / 2 compression circuit and 2 × expansion circuit 2) Internal 2-channel buffer amplifier used as a tertiary low pass filter 3) Internal mixer amplifier that mixes line input and microphone input 4) Internal electronic volume control allows for adjustment of the echo mixer level and loop mixer level using an external DC voltage. 5) Internal microphone amplifier and microphone input ON / OFF switch
