Soundcraft Si Expression 3 Digital Mixer, 32-Channel

Mix 32 channels to perfection with 4-band Soundcraft EQ, Lexicon FX processing, graphic EQ on all bus and matrix outputs, color-coded FaderGlow, and more.

Drawing on more than a decade of experience in the field of digital audio mixing, the Soundcraft Si Expression 3 Digital Mixer exploits DSP, component technology and manufacturing techniques to deliver Soundcraft's most powerful, most cost-effective digital console ever. Each console in the Si range is identical in its feature set -- so your only choice is how many faders and local mic preamps you want. The mighty Si Expression 3 features 30+2 faders and 32 mic/line inputs.


- 32 mono mic inputs
- 4 line inputs
- Color touch screen interface
- 66 channels to mix possible
- Pre/Post selection per input per bus
- AES in and out
- Global mode encoders
- Soundcraft FaderGlow
- GEQ on every bus
- 20 sub-group / aux busses
- 4 FX busses
- 8 Matrix busses
- LR and C Mix busses
- 4 Stereo Lexicon Effects engines
- Delay on inputs and outputs
- 4 Mute Groups
- Freely assignable insert loops
- Harman HiQnet integration
- 64x64 channel option card slot

The Si Expression 3 has 32 recallable mic preamps, plus 4 line inputs, 4 internal stereo FX returns, AES in, and a 64x64 expansion slot -- offering more than enough scope to use every one of the 66 input processing channels. Every input processing channel has dedicated processing for high pass filter, input delay, gate, compressor and four band EQ whilst keeping it under control is a comprehensive automation system augmented with four mute groups and FaderGlow to light the way so you are never lost.

All Si Expression consoles read more have busses, output processing and connectivity to match the versatility of the inputs; the 14 aux/group mixes can be configured as 14 mono mixes, 8 mono plus 6 stereo mixes or almost anything in between, whilst the 4 matrix mixes can be mono or stereo as needed. The bus and matrix mixes are complemented with four more mix busses dedicated to the internal Lexicon FX processors all in addition to the left, right and centre busses. Each bus mix features a compressor, 4 band EQ, BSS graphic EQ and delay always available all of the time. Output connectivity is comprehensive with all models featuring 16 balanced line outputs, headphone monitor out, AES out and of course the 64x64 option slot.

To complement the channel and bus processing, all Si Expression consoles integrate four stereo Lexicon FX processors 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.

Flexible onboard and expansion I/O options ensure your Si Expression integrates effortlessly with other system components utilizing any of the Si series option cards, including AES, Firewire/USB/ADAT*1, AVIOM, CobraNet, BSS Digital Audio Bus (BLU Link)*1, Dante*1 CAT5 or optical MADI. The MADI card, as well as being an interface to multi-track recording systems or plug-in systems like Waves, enables linking the Si Expression to any of the Soundcraft or Studer stageboxes to extend the I/O power and flexibility. Adding a stagebox to an Si Expression actually increases the number of channels you can mix at once not just how many inputs you have available to choose from! It is said "Power is nothing without control," and here the Si Expression excels with a comprehensive but simple-to-use control surface, incorporating a dedicated control for every parameter, a row of global mode encoders and color touch screen ensuring operation is quick and easy.

As you would expect from any Soundcraft digital mixer, the facilities are extensive and include legendary audio quality courtesy of this generation of EMMA DSP processor -- the same DSP platform that has helped propel previous Soundcraft Si series consoles to fame. All this power united with reliability, flexibility and usability puts the Si Expression in a class of its own.

D.O.G.S. (Direct Out Gain Stabiliser)

Prevents manual change of a mic gain control affecting direct out levels, perfect when 2 consoles share a stagebox or when recording the channel direct outputs.

Security Lockout

Lock the whole console or just selected elements, manage the security with the users and profile settings.

Assignable Fader Layers

Customize each of the four fader layer pages to meet your needs or add/insert faders to accommodate that additional mic that was not in the patch list!

Copy & Paste

Copy whole channels, busses, mixes, Lexicon effects, a single part such as the EQ or multiple parts like the channel gate and compressor.


The One Touch Easy Mix; press a single key to mix to an AUX, FX or Matrix bus, the surface and monitoring instantly reconfigure to allow instant mixing to your chosen bus on the faders.


With a BSS GEQ on every bus there is never any need to assign from a pool of resources and you will never 'run out' of processing.

1 Control = 1 Function

With each control dedicated to a given function there is never any 'layering' of controls or navigating through screens; this allows the Si Expression controls to be labelled on the surface just as they would have been on an analogue mixer.

Global Mode Controls

A row of rotary controls above each fader assignable at the touch of a button to be GAIN, PAN or HPF for all of the inputs allowing instant access to the core functions.

Soundcraft FaderGlow

Illuminates the fader slots according to function with clearly defined colors for FX, Stereo, Linked Mono, GEQ, POST Fade Aux, PRE Fade Aux; you'll never be lost again!

Instant Access Keys

Dedicated keys on the front panel for STORE, RECALL, NEXT, MUTE 1-4, TAP TEMPO and more negate the need to dive into screen & context menus.

Function Focus

Whenever a control is moved or SELect key pressed the screen displays information about the channel identifying the absolute value of the controls and the channel name, number etc.

Everything Everywhere

All channels and busses have a full complement of processing, nothing to assign or configure.
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- Analog/Digital: Digital
- Frame Sizes: 66
- Stereo Channels: variable
- Digital I/O: Yes
- FX Processors: 4
- Groups: 0
- EQ Bands: 4
- Aux Sends: 24
- Returns: 6
- Direct Outputs: Yes
- Matrix Outputs: 8
- Main Bus Out: LRC
Dimensions and Weight in Packaging
Warehouse Resealed, USED
Shipping Weight: 60 lbs
Shipping Dimensions: 41 x 27 x 11 in
Manufacturer Part Number (MPN): Si Expression 3

USED, Warehouse Resealed

What is USED, Warehouse Resealed?
Was $2,419.00
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