The Soundcraft Si Expression 1 16-channel digital mixer leverages cutting-edge DSP, component technology, and manufacturing techniques to deliver awesome mixing power in a compact, amazingly affordable rackmount package. The Si Expression 1 gives you 16 recallable mic preamps, four line inputs, four internal stereo FX returns, and AES in. A 64 x 64 expansion slot lets you deploy up to 66 input processing channels. Each sports a highpass filter, input delay, gate, compressor, and 4-band EQ. Robust automation and connectivity are the icing on the cake. Take your mixing to the next level, with Soundcraft’s Si Expression 1 digital mixer.