The Allen & Heath ZED-420 4-bus audio mixer offers 16 mono inputs, plus 2 dual stereo channels and features the padless DuoPreTM mic/line pre-amplifier to deliver a high-headroom, low-noise signal. Its 4-band, 2-sweep EQ (along with its low noise summing amps) is borrowed from the acclaimed GL2400, while the bus architecture is a simplified, but equally comprehensive version of what’s employed in the renowned GL series.Its USB audio interface, with its uniquely flexible capability, allows different signals to be sent to USB, from LR or from selected aux buses. The USB return signal can be routed straight to the LR mix, or to a stereo channel. Connectors are on top for easy plugging and patching. Construction, with individual circuit boards firmly nutted to the top panel, is as rock-solid as Allen & Heath’s top-of-the-range ML Series audio mixers.Also included is SONAR LE digital audio workstation software for Windows. With audio and MIDI multi-track recording and mixing capability, effects plug-ins and editing features, SONAR LE enables the ZED-420 4-Bus mixer to become a live recording or home recording mixer. 16 mono inputs plus 2 dual stereo channels, 4-Bus 4-band EQ with 2 swept mids and in/out switch 6 auxiliary sends (2 pre, 2 post, 2 pre/post) 4 sub groups fed from each channel L, R and M main mix outputs Individual channel 48V phantom power Direct output on every mono channel 2 dual stereo inputs with 4-band EQ Peak and signal indication on every channel 2 matrix sections available; can send output to USB Configurable USB stereo audio in/out Master level controls on all outputs Easy to use layout, all connections and controls on top surface Cakewalk SONAR LE bundled with mixer