K800=Combined Function of Feedback Controller+Equalizer+DSP Processor+Effector+Analog Delay+Mixer+Excited Features: 255MHz main frequency, 96KHz sampling frequency, 24 bit A/D and D/A converter, 32 bit DSP processor. 6 balanced output channels, can be flexible with the power op-amp. HPF and LPF are for MIC input channels, 16 bands PEQ is for MIC and music. 7 PEQ, crossovers, audio route, polarity, delay, limiter and gain are for main outputs. 5 PEQ, crossovers, audio route, polarity, delay, limiter and gain are for center, SUB and surround outputs. USB connector is available with PC software. The last save state will be used when it is on. 10 preset and 10 user settings are available and 1 key to factory setting. 2 levels lock function.