Soundcraft Ui24R Rack Mount 24-Channel Digital Mixer

Plug into 20 Studer mic preamps, connect your laptop, tablet or phone to the Soundcraft Ui24R over Wi-Fi, and mix/record with pro Lexicon and dbx processing.

Soundcraft Si Expression 1 Digital Mixer, 16-Channel

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With 16 recallable mic preamps, 4-band EQ for each channel, and onboard Lexicon effects, this digital mixer packs a lot into a 19" rack-mountable footprint.

Drawing on more than a decade of experience in the field of digital audio mixing, the Soundcraft Si Expression 1 Digital Mixer exploits DSP, component technology and manufacturing techniques to deliver Soundcraft's most powerful and 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.


- 16 mono mic inputs
- 4 line inputs
- Colour 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 super-portable 19" rack-mountable Si Expression 1 features 16 recallable mic preamps, plus 4 line inputs, 4 internal stereo FX returns, AES in, and a 64 x 64 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 have busses, output processing and read more 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 utilising 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 the next generation 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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- Analogue/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

Reviewers gave this product an overall rating of 4.5 out of 5 stars. (1 ratings)
Submitted April 17, 2014 by Alan G in Chesapeake, VA

"Best bang for the buck..."

Overall: 4.5 out of 5 stars
(see rating details)
Verified Customer zZounds has verified that this reviewer made a purchase from us.
I thought I'd never be able to own this mixer, but the 12-month pay-as-you-play has made it possible! I owned a Presonus 16.0.2 and upgraded to the Si Expression 1. This mixer is much quieter and has more usable channels. If I need more channels, I can easily added a stagebox mini without having to buy a bigger mixer. Best mixer I've ever owned.

Musical Background:

Weekend musician at church

Musical Style:

Rock, Country, Jazz, Gospel
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No longer available at zZounds