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Allen & Heath ZED-428 28-Channel 4-Bus Analog Mixer with USB Connection

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Allen & Heath  |  SKU: AH-ZED428

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The Allen & Heath ZED-28 is a 28-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 24 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-28 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.

24 Mono Inputs
There are 24 mono input channels with Neutrik connectors—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 sends—two pre-fader, two post-fader, and two switched pre- or post-fader— 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-428 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

Features

4 Bus Mixer for Live Sound and Recording

  • 24 mic/line channels with inserts
  • 2 stereo channels
  • 2 in / 2 out USB audio interface
  • 6 aux sends (2x pre, 2x post, 2x pre/post)
  • 4 sub groups
  • XLR main outputs with insert points
  • 4-band EQ with sweepable mid
  • 7×2 matrix
  • Durable 100mm faders
Specs
Number of Analog Input Channels
28
Number of Mic Preamps
24
Analog Output Channels
1x Stereo Master Output
1x Mono Master Output
4x Mono Bus/Subgroup Output
6x Mono Aux Send Output
2x Mono Matrix Output
1x Stereo Tape/Record Output
1x Stereo Headphone Output
Built-In Effects
No
USB I/O
1x USB-B 1.1()
Rack Mountable
No
Mixer
Number of Analog Input Channels
28
Number of Mic Preamps
24
Analog Output Channels
1x Stereo Master Output
1x Mono Master Output
4x Mono Bus/Subgroup Output
6x Mono Aux Send Output
2x Mono Matrix Output
1x Stereo Tape/Record Output
1x Stereo Headphone Output
Faders & Level Adjustment
3.9" / 100 mm Channel Fader
Meters
Main Meter:
2x 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
No
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:
-89 dB (24 Channels Routed, Ref +4 dBu, 22 Hz to 22 kHz)
-85 dBu (24 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
1x Stereo RCA Coaxial 2-Track Input
1x XLR 3-Pin Balanced Talkback Input
2x Stereo RCA Coaxial Unbalanced Aux/Line Input
24x 1/4" TRS Unbalanced Channel Insert
4x 1/4" TRS Unbalanced Subgroup Insert
2x 1/4" TRS Unbalanced Stereo Main Insert
1x 1/4" TRS Unbalanced Main Insert
24x XLR 3-Pin Balanced Mic Input
24x 1/4" TRS Balanced/Unbalanced Line Input
4x 1/4" TRS Balanced/Unbalanced Line Input (2 Stereo Pairs)
Analog Outputs
1x 1/4" TRS Headphone Output
1x 1/8" / 3.5 mm TRS Headphone Output
1x Stereo RCA Coaxial Unbalanced 2-Track Output
24x 1/4" TRS Balanced Direct Output
3x XLR 3-Pin Balanced Main Output
4x 1/4" TRS Balanced Subgroup Output
2x 1/4" TRS Balanced Matrix Output
6x 1/4" TRS Balanced Mono Aux Send
Phantom Power
+48 V (Selectable on Individual Inputs)
USB I/O
1x USB-B 1.1()
USB I/O Capacity
2x Input / 2x Output
Power
AC Input Power
100 to 240 VAC, 50 / 60 Hz
Power Consumption
60 W (Maximum)
Physical
Rack Mountable
No
Dimensions
36.6 x 5.1 x 22.1" / 93 x 12.9 x 56 cm
Weight
40 lb / 18.1 kg
Packaging Info
Package Weight
62 lb
Box Dimensions (LxWxH)
42 x 22 x 10.8"

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