GEFFEN8 in and out of 8 digital audio processor, automatic mixing matrix, equipped with 8 analog inputs and 8 analog outputs, built-in feedback suppression, automatic mixing, matrix mixing, equalizer, splitter, compressor and other DSP functions, through the RJ45 interface drive-free connection to computer software control or RS232/RS485 connection to the central control remote control, suitable for various occasions of amplification engineering.