Soundcraft M4 is a compact analog mixer from the Spirit M Series featuring 4 mono inputs, 4 stereo inputs and 4 stereo returns. It provides four auxiliary sends (Aux 1–2 pre‑fade, Aux 3–4 post‑fade), a stereo Mix bus with XLR main outputs, and an S/PDIF digital mix output. Mono channels offer direct outputs switchable pre/post fade; Mute and PFL are available on all input channels. The M Series is discontinued by the manufacturer.