The Allen & Heath ZED-20 is a 20-channel analog mixer offering versatile I/O and a user-friendly workflow for use in home and project studio recording, houses of worship, and live sound reinforcement. The 16 mono channels feature Neutrik XLR mic and 1/4` line inputs, DuoPre preamps with phantom power and bountiful gain, 1/4` insert points, and 4-band EQ with sweepable mids, while the two stereo channels have 1/4` inputs and 4-band EQ with fixed mids. All channels are equipped with long-throw 100mm faders, solo and mute buttons, and independent aux send knobs.
The six aux sends are ideal for routing to floor monitors and outboard time-based effects. A USB 1.1 port delivers 2-channel send and return capabilities via a Mac or Windows computer. There are stereo and mono main outputs in addition to four group outputs, two matrix outs, and two headphone outputs; multi-segment LED meters clearly indicate your group and main output levels. Patch additional stereo sources into the RCA stereo returns and 2-track input. The 2-track RCA output is handy for recording your mix to an external device such as a cassette deck or computer soundcard. The ZED-20 also boasts an external talkback mic input with an adjustable level and the ability to route the talkback signal to the first four aux`s or to all main outputs.
16 Mono Inputs
There are 16 mono input channels with Neutrik connectorsa XLR for balanced mic signals, and 1/4` for balanced/unbalanced line-level sources
Two Stereo Inputs
The two stereo input channels feature 1/4` connectors to accommodate stereo devices such as keyboards, synth modules, and external effects processors
Flexible EQ Section
Based on the acclaimed GL2400 EQ, all mono channels feature 4-band EQ with sweepable midrange bands, while the stereo channels offer 4-band EQ with fixed frequencies on all bands
Inserts
Inserts on all mono channels, the group outputs, and the main outputs provide easy integration of analog outboard gear such as hardware compressors and equalizers
Direct Outputs
1/4` direct outputs on all mono channels enable simple routing to a multi-track recorder
Independent Aux Sends
Six auxiliary sendsa two pre-fader, two post-fader, and two switched pre- or post-fadera with independent level controls allow versatile signal routing to cue mixes, floor monitors, and external effects processors
4-Bus Group Outputs
Four group outputs can be used for easy control of submixes, or for applying signal processing such as compression to groups of signals using the group insert connectors
USB Connection
A USB 1.1 port allows direct connection to Mac and Windows computers for stereo audio I/O
Flexible Outputs
The ZED-420 offers balanced XLR main outputs (stereo and mono) with inserts, 1/4` and 3.5mm stereo headphone outputs, and two matrix outputs
Integrated Talkback Facilities
Connect an external mic to the XLR talkback mic input, then send it to the first four aux outputs or to all main outputs
Allen & Heath ZED-420 Specs
Mixer
| Number of Analog Input Channels | 20 |
| Number of Mic Preamps | 16 |
| Analog Output Channels | 1 x Stereo Master Output 1 x Mono Master Output 4 x Mono Bus/Subgroup Output 6 x Mono Aux Send Output 2 x Mono Matrix Output 1 x Stereo Tape/Record Output 1 x Stereo Headphone Output |
| Faders & Level Adjustment | 3.9" / 100 mm Channel Fader |
| Meters | Main Meter: 2 x 12-Segment LED Bus Meter: 4-Segment LED Channel Meter: 2-Segment LED |
Signal Processing
| Gain/Trim Range | Mic Input: -6 dB to +63 dB Line Input: -10 dB to +26 dB Stereo Input: -+? to +10 dB Fader: -+? to +10 dB Return: -+? to +10 dB Aux: -+? to +10 dB Matrix: -+? to +6 dB |
| EQ Parameters | Mono Channels: High: ±15 dB at 12 kHz (Shelving) Hi-Mid: ±15 dB at 500 Hz to 15 kHz (Notch/Peak) Lo-Mid: ±15 dB at 35 Hz to 1 kHz (Notch/Peak) Low: ±15 dB at 80 Hz (Shelving) Stereo Channels: High: ±15 dB at 12 kHz (Shelving) Hi-Mid: ±15 dB at 2.5 kHz (Notch/Peak) Lo-Mid: ±15 dB at 250 Hz (Notch/Peak) Low: ±15 dB at 80 Hz (Shelving) Mono Channels: High: ±15 dB at 12 kHz (Shelving) Hi-Mid: ±15 dB at 500 Hz to 15 kHz (Semi-Parametric) Lo-Mid: ±15 dB at 35 Hz to 1 kHz (Semi-Parametric) Low: ±15 dB at 80 Hz (Shelving) Stereo Channels: High: ±15 dB at 12 kHz (Shelving) Hi-Mid: ±15 dB at 2.5 kHz (Notch/Peak) Lo-Mid: ±15 dB at 250 Hz (Notch/Peak) Low: ±15 dB at 80 Hz (Shelving) |
| Filters | High-Pass: 100 Hz, 12 dB/Octave |
| Solo/Mute | Mute, PFL per Input Channel Mute, Solo-in-Place/AFL per Bus Mute per Master |
| Built-In Effects | None |
Digital Audio
| Sample Rates | 32 / 44.1 / 48 kHz |
| Bit Depth | 16-Bit |
Performance
| Headroom | Analog: +21 dB USB I/O: +14 dB |
| Frequency Response | Mic Input to Main Output: 20 Hz to 20 kHz +0.5/-1 dB (30 dB Gain) Line Input to Main Output: 10 Hz to 30 kHz +0.5/-1 dB (Unity Gain) Stereo Input to Main Output: 10 Hz to 30 kHz +0.5/-1 dB |
| Max Input Level | Mic Input: +17 dBu Line Input: +30 dBu (Mono) Insert Return: +21 dBu |
| Output Level | XLR Main Output: +4 dBu (Nominal) +27 dBu at Max Gain Group Output: +4 dBu (Nominal) +27 dBu at Max Gain Aux Output: -2 dBu (Nominal) +21 dBu at Max Gain Matrix Output: -2 dBu (Nominal) +21 dBu at Max Gain Insert Send: -2 dBu (Nominal) +21 dBu at Max Gain Tape/Record Output: 0 dBu (Nominal) +21 dBu at Max Gain Direct Output: 0 dBu (Nominal) +21 dBu at Max Gain |
| EIN | -127 dBu at Max Gain (150-Ohm Input) |
| Noise Floor | Main Output: -90 dB (16 Channels Routed, Ref +4 dBu, 22 Hz to 22 kHz) -86 dBu (16 Channels Routed, Ref +4 dBu, 22 Hz to 22 kHz) |
| THD+N | Mic Input to Main Output: 0.004% at Unity Gain (+10 dBu, 1 kHz) Mic Input to Main Output: 0.014% at +30 dB Gain (1 kHz) Line Input to Main Output: 0.005% at Unity Gain (0 dBu, 1 kHz) Stereo Line Input to Main Output: 0.003% at Unity Gain (+10 dBu, 1 kHz) |
Connectivity
| Analog Inputs | 1 x Stereo RCA Coaxial 2-Track Input 1 x XLR 3-Pin Balanced Talkback Input 16 x 1/4" TRS Unbalanced Channel Insert 4 x 1/4" TRS Unbalanced Subgroup Insert 2 x 1/4" TRS Unbalanced Stereo Main Insert 1 x 1/4" TRS Unbalanced Main Insert 16 x XLR 3-Pin Balanced Mic Input 16 x 1/4" TRS Balanced/Unbalanced Line Input 2 x Stereo RCA Coaxial Unbalanced Aux/Line Input 4 x 1/4" TRS Balanced/Unbalanced Line Input (2 Stereo Pairs) |
| Analog Outputs | 1 x 1/4" TRS Headphone Output 1 x 1/8" / 3.5 mm TRS Headphone Output 1 x Stereo RCA Coaxial Unbalanced 2-Track Output 16 x 1/4" TRS Balanced Direct Output 3 x XLR 3-Pin Balanced Main Output 4 x 1/4" TRS Balanced Subgroup Output 2 x 1/4" TRS Balanced Matrix Output 6 x 1/4" TRS Balanced Aux Send |
| Phantom Power | +48 V (Selectable on Individual Inputs) |
| USB | 1 x USB-B 1.1() |
| USB I/O Capacity | 2 x Input / 2 x Output |
Power
| AC Input Power | 100 to 240 VAC, 50 / 60 Hz |
| Power Consumption | 60 W (Maximum) |
Physical
| Rack Mountable | No |
| Dimensions | 28.2 x 5.1 x 22.1" / 71.5 x 12.9 x 56 cm |
| Weight | 31 lb / 14.1 kg |
Packaging Info
| Package Weight | 49 lb |
| Box Dimensions (LxWxH) | 33.5 x 27.5 x 10.6" |
In the Box
- Allen & Heath ZED-420 20-Channel 4-Bus Analog Mixer with USB Connection
- USB Cable
- Power Cable
- 2 Year Manufacturer Warranty
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