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The ZED‑420 is part of Allen & Heath’s ZED “4‑Bus” series — large analog mixers intended for live sound, recording, and professional use.
It combines a robust analog mixing architecture with modern features like USB connectivity and flexible routing.
Key Features and Specifications:
| Feature | Detail |
|---|---|
| Channels / Inputs | 16 mono channels (mic/line) + 2 dual stereo input channels. |
| Mic Preamps | Uses DuoPre (a two-stage preamp design) offering wide gain range (~69 dB) and low noise. |
| EQ & Filtering | 4‑band EQ on each mono channel, with two mids being sweepable; stereo channels also have 4‑band EQ (fixed mids). |
| Aux / Effects Sends | 6 auxiliary sends: two are pre‑fade (for monitors), two are switched pre/post (for effects), and two post‑fade. |
| Groups / Submix | It features 4 subgroup (“bus”) outputs per channel to allow sub‑mixing. |
| Routing / USB | USB I/O is built in with flexible routing. You can route various mix outputs (e.g. main LR, aux, matrix) to USB and choose where the USB return is routed (to LR mix or to a stereo channel). |
| Metering & Indication | Each channel includes peak / signal LEDs, PFL / solo, mute indicators. Main mix and subgroup outputs have meter displays. |
| Direct Outputs | Each mono channel has a direct (1/4") output (post-EQ) for external recording or routing. |
| Phantom Power | +48 V phantom power is available for condenser microphones on mic channels. |
| Bus / Matrix | In addition to the 4 subgroup buses, the mixer offers 2 matrix output sections, which you can also route to USB if desired. |
| Build / Layout | Uses individual vertical PCBs, knobs secured with metal nuts, robust chassis. Faders are long‑throw (100 mm style) for precision. |
| Main Outputs | Balanced XLR outputs for main left/right; mono main; subgroup outputs; plus stereo returns. |
