main feature

■ Use CMOS technology.

■ Input multiplexing.

■ 4 stereo inputs.

■ Optimally adaptable to different sound sources Enter gain.

■With loudness function, treble and bass control.

■ Volume control (1.25 dB per step).

■ Treble and bass controls.

■ Two speaker attenuators.

■ Two independent speaker equalization and volume control devices.

■ Independent mute function.

■ A program that can realize all functions through the serial I2C bus change.