Soundcraft Si Expression 1 16 Channel Digital Live ConsoleDrawing on more than a decade of experience in the field of digital audio mixing, the Soundcraft Si Expression 1 exploits some of the newest DSP, component technology and manufacturing techniques to deliver our most powerful cost effective digital console ever! It features 16 recallable mic pre amps plus 4 line inputs, 4 internal stereo FX returns, AES in, and a 64x64 expansion slot offering more than enough scope to use every one of the 66 input