MACKIE ProFXv2 series consoles offer comprehensive solutions for live sound, with models from 4 to 30 channels and unmatched sound quality thanks to their virtually noise-free Mackie Vita mic preamps designed specifically for live sound. Vita Preamps. FX ReadyFX Engine effects module. Recording and playback via USB. The ProFXv2 also include the immensely powerful ReadyFX effects processor, with floating point DSP that offers 16 effects to round out your live mixes. The Pro FX 12 V2 has ProFX12v2 12 line inputs, 6 microphone inputs, 2 aux.