32 (16 - Si Expression 1, 24 – Si Expression 2) mono mic inputs4 line inputs66 inputs to mix1 ViSi Connect? option card slot for 64 x 64 input/output expansionFreely assignable faders and patchingPre/Post selection per input per busAES in and outGlobal mode encodersSoundcraft FaderGlow?GEQ on every bus20 sub-group / aux busses4 FX busses8 Matrix bussesLR and C Mix busses4 Stereo Lexicon Effects enginesDelay on inputs and outputs4 Mute GroupsFreely assignable insert loopsHarman HiQnet integrationColour touch screen interface