Allen & Heath ZED-428 24-Channel Mixer

The versatile ZED-428 24-Channel Mixer from Allen & Heath gives you the professionalism and quality you crave from both your live and recorded audio. Delivering the tools you need to take your audio project to the next level, this mixer boasts 4-band EQ, DuoPre amps, as well as 24 mic or line inputs plus 2 dual stereo inputs, 4 sub-groups, 6 auxiliary sends, and a 7×2 matrix. Whether you need excellent sound for a live concert, house of worship, theater, sound reinforcement, or other AV application, this mixer gives you the tools you need to excell in myriad applications.

Built into the ZED-428 is a responsive 4-band, swept mid-frequency EQ design at uses MusiQ. Its optimized slope (Q factor) allows you to precision-equalize individual instruments in your band.

The ZED-428 includes DuoPre pre-amplifiers that use a 2-stage design and carefully controlled gain in each stage. These preamps boast a gain range of 69dB and reliably-even gain control when amplifying a signal from the mixer’s XLR input. Most of the gain comes from the first stage, which keeps unwanted noise to a minimum. Plug line level signals into the preamp’s second stage using the line input jack socket, which results in less noise when using line input or when matching a higher input impedance.

The ZED-428 comes with configurable USB audio inputs and outputs. No need to install external soundcards—just plug in a USB lead and select USB routing on the mixer to get started right away at your recording. This feature gives you CD-quality audio to and from your Mac or PC, while switches and connections via the mixer’s jack socket terminals offer a variety of send/return options. Rounding out the ZED-428’s connectivity options are 2 stereo inputs for MP3/CD players or keyboards, as well as professional XLR stereo outputs and a versatile monitoring section that lets you plug in headphones and/or speakers.

Allen & Heath ZED-428 Features

• 24 mono channels
• 2 dual stereo inputs with 4-band EQ
• Neutrik mic XLR
• Neutrik ¼ inch jacks
• Channel insert
• Super wide gain 'DuoPre' mic line input
• 4-band EQ with 2 swept mids and in/out switch
• Illuminated mute
• Sound image pan
• Illuminated PFL & peak warning indicator
• ALPS 100mm faders
• 6 auxiliary sends (2 pre, 2 post, 2 pre/post)
• 4 sub groups fed from each channel
• All inputs with level control
• 12 bar meters
• L, R and M main mix outputs
• 2 matrix sections available; can send output to USB
• Individual channel 48V phantom power
• Direct output on every mono channel
• Peak and signal indication on every channel
• Configurable USB stereo audio in/out
• Master level controls on all outputs
• Easy to use layout - all connections and controls on top surface

• ZED-428 24-channel mixer1
• Mains lead1
• Type A-B USB Lead1
• One Year Limited Manufacturer Warranty1

• Operating Levels
  • Inputs
    • Mono channel (XLR) Input: +6 to –63dBu for nominal (+17dBu in max)
    • Mono channel Line Input (Jack socket): +10 to –26dBu (+30dBu maximum)
    • Insert point (TRS Jack socket): 0dBu nominal +21dBu maximum
    • Stereo Input (Jack sockets): 0dBu nominal (control = Off to +10dB)
    • Stereo input (phono sockets): 0dBu nominal (control = Off to +10dB)
    • 2 Track Input (phono sockets): 0dBu nominal +21dBu maximum
  • Outputs
    • L, R & Mono Outputs (XLR): +4dBu nominal. +27dBu maximum.
    • L, R & M Insert (TRS Jack socket): -2dBu nominal +21dBu maximum
    • Group Outputs (Jack sockets): +4dBu nominal. +27dBu maximum.
    • Group Insert (TRS Jack socket): -2dBu nominal +21dBu maximum
    • Aux Outputs (Jack sockets): -2dBu nominal +21dBu maximum (Bal Option +4)
    • Matrix Outputs (TRS Jack socket): -2dBu nominal. +21dBu maximum (Bal Option +4)
    • 2 Track Output (phono sockets): 0dBu nominal. +21dBu maximum
    • Direct Out (TRS Jack socket): 0dBu nominal. +21dBu maximum
• Frequency Response
  • Mic in to Mix L/R Out, 30dB gain: +0.5/-1dB 20Hz to 20kHz
  • Line in to Mix L/R out 0dB gain: +0.5/-1dB 10Hz to 30kHz
  • Stereo in to Mix L/R out: +0.5/-1dB 10Hz to 30kHz
• THD+n
  • Mic in to Mix L/R Out, 0dB gain 1kHz +10dBu out: 0.004%
  • Mic in to Mix L/R Out, 30dB gain 1kHz: 0.014%
  • Line in to Mix L/R out: 0dB gain 0dBu 1kHz: 0.005%
  • Stereo in to Mix L/R out: 0dB gain +10dBu 1kHz: 0.003%
• Headroom
  • Analogue Headroom from nominal (0Vu): 21dB
  • USB in & out headroom from nominal (0Vu): 14dB
• USB Audio CODEC (Coder/Decoder)
  • USB Audio In/Out: USB 1.1 compliant 16bit
  • Sample Rate: 32, 44.1, or 48kHz
• Noise
  • Mix Noise, LR out, 16 channels routed, Ref +4dBu, 22-22kHz: -90dB (-86dBu)
  • Mix Noise, LR out, 24 channels routed, Ref +4dBu, 22-22kHz: -89dB (-85dBu)
  • Mix Noise, LR out, 32 channels routed, Ref +4dBu, 22-22kHz: -88dB (-84dBu)
  • Mic Pre EIN @ max gain 150R input Z 22-22kHz: -127dBu