Allen & Heath ZED-428

Allen & Heath ZED-428 front view


  • 24 Mic/Line Inputs
  • 24 Direct Outputs
  • 2 Dual Stereo Inputs
  • DuoPre Preamp with 69 dB Gain range
  • 6 AUX Sends
  • USB Send and Return
  • 4-Band EQ with 2 x semi parametric midrange
  • Insert per channel
  • 4 Sub groups
  • High Pass Filter
  • Mute per channel
  • Stereo Return
  • 2-Track Return
  • 6.3 mm Headphone connector
  • Stereo Record Output
  • Alternative Stereo Output
  • Mono sum of LR output
  • 2 Matrix Outputs
  • Master LR
  • 12-Segment L/R meters
  • Master control for all AUX sends
  • Weight: 21 kg
  • Dimensions: 930 x 560 x 129 mm


Allen & Heath ZED-428 top view

Soundcraft Si Expression 2

Soundcraft Si Expression 2 front view


  • 24 mono mic inputs
  • 4 line inputs
  • Flying faders
  • 44 channels for mixing (on two layers)
  • 66 logical inputs to output mix
  • Freely assignable faders and patching
  • Pre/Post selection per input per bus
  • AES in and out
  • Global mode encoders
  • Graphic EQ available on every bus
  • 14 sub-group / aux busses (8 mono and 6 stereo)
  • 4 FX busses
  • 8 Matrix busses
  • LR and C Mix busses
  • 4 Stereo Lexicon Effects engines
  • Delay on inputs and outputs
  • 4 Programmable Mute Groups
  • Colour touch screen interface
  • Store and recall some or all desk settings
  • Create different mixes for different cues and save them as a Show
  • Back-up Shows to a USB stick and recall them as required
Soundcraft Si Expression 2 rear view
The Si Expression 2 features: 
  • 24 recallable mic pre amps 
  • 4 line inputs
  • 4 internal stereo FX returns
  • AES in
Every input processing channel has the following:
  • high pass filter
  • input delay
  • noise gate
  • compressor
  • four band EQ 
Left & Right, and Centre busses (Left & Right are connected to Ouputs 15 & 16 by default but this can be repatched)

14 aux sends/group mixes can be configured as:
  • 14 mono mixes
  • 8 mono plus 6 stereo mixes or almost anything in between

The 4 matrix mixes can be mono or stereo as needed. 

There are four more mix busses dedicated to the four internal Lexicon FX processors that are based on the MX400, providing a wealth of sounds, user adjustable parameters and dedicated tap-tempo keys. As the FX are hardware based, use of all the effects, even on the most demanding programmes does not affect other processing in any way and all dynamics, EQs, filters, delays, and GEQs remain available regardless what you are doing. 

Each bus mix features a compressor, 4 band EQ, BSS graphic EQ and delay.

Output connectivity is comprehensive with:
  • 16 balanced line outputs
  • headphone monitor out
  • AES out