Key Features 32 Microphone Preamps 7" Capacitive Touchscreen 96 kHz FPGA Processing Eight Stereo FX Engines with Returns Show More The Allen & Heath SQ-7 is a 48-channel, 36-bus digital mixing console well suited for live sound, corporate A/V, recording studios, and houses of worship. The SQ-7 features 32+1 motorized faders and 32 professional-quality microphone preamps. There are also eight stereo FX engines with dedicated return channels and access to