8 input versions, S/PDIFDigital output, 8 input versions, S/PDIFDigital output, Low noise, low distortion and RF rejection mic preamps, Great British EQ with HF range, improvements, Ground tracking architecture minises noise and hum, 100mm fader throw, Professional grade connections throughout, IMaster gain control on all aux busses, Switchable direct outputs, Intelligent rackmounting system, Direct outputs ( pre or post fade ), on all mono channels, Signal present and peak LEDs on all input channels, Mute and PFL on all input channels, 4 Stereo inputs on all variants, 4 Stereo returns & return master for FX returns.