Rotary encoders and OLED screens on every channel

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The new Si1+ has a very compact footprint of just 1200mm (47.3") width, meaning it fits nicely into space-restricted areas such as theatres, small venues, and Houses of Worship, and of course comes at an extremely competitive price. It expands on the original Si1 through the addition of 16 more mic inputs, two more option slots, redundant PSU capability and word clock out as standard.

Si1+ has 48 mic inputs mapped on 16 faders, and with four dedicated Stereo Line channels plus four dedicated FX Returns from the four internal stereo Lexicon FX processors offers 64 inputs to mix from the onboard I/O. The 16 additional mic inputs can be exchanged for an 8 mic input + 8 line output module if required whist the four 64x64 channel expander slots allow the installation of further I/O sources including the connection of Soundcraft and Studer stageboxes.

Eight balanced insert sends and returns are provided along with the same bus structure as the Si2+ and Si3+ of 24 Group/Aux busses, 8 matrix busses and a full complement of monitor talkback and main bus outputs. Buses may be freely assigned to any of the option slots or 16 bus out XLR connectors which exist in addition to the dedicated MIX and monitoring output XLRs. Every bus has a dedicated 30-band BSS Audio graphic EQ, permanently patched in with no additional drain on DSP resource. A direct out from every mono channel offers a simple way to record every channel whether requiring this for later mix-down and production work or to use as a virtual sound-check at the next gig!

Such is the power and topology of the Si Series that the separate DSP and control engines allow you to make any system or function changes live with no interruption in the audio.

Like the Si3+ and Si2+, the Si1+ uses a combination of rotary encoders and OLED screens on every channel so the engineer mixes at source, without recourse to a central screen, an interface welcomed by many engineers since its launch. Using the center section and channel encoders, it is possible to simultaneously monitor and control input EQ, input dynamics and output EQ. Soundcraft’s offline editor program, Virtual Si, can be used to setup and manage complete shows offline, for later download to the console through a USB memory key.

With a wealth of input and output connections and power supply on board, the Si1+ simply drops in where an existing analogue console sat utilising existing copper cable snakes and splitter systems.



One Box

  • 48 mic inputs, 4 stereo line inputs, 24 aux busses
  • 8 matrix, 12 VCAs, 8 mute groups
  • 4-band fully parametric EQ with high and low cut filters
  • On-board dynamics
  • Four independent Lexicon processors with dedicated returns
  • 24 analogue outputs
  • 32 XLR outputs and LED meter for every aux bus


On the rear of this highly-featured console are a host of I/O connectors to cover almost any need. Fourty eight XLR’s for the mic/line inputs, 4 stereo line level inputs, 16 bus output XLR’s, dedicated XLRs for Left/Right/Centre mix output, Left/Right/Centre monitor output, internal and external talkback and Oscillator connections. There are also 8 analogue insert connections which allow outboard processing to be inserted into any input channel or output bus.

Offline Editor - Virtual Si

To compliment the Soundcraft Si3+, an offline editor (Virtual Si) is available for managing your show files offline.



Frequency Response - Mic input to Line output +0/-1dB, 20Hz – 20kHz
Frequency Response - Stereo input to master output +0.5/-0.5dB, 20Hz – 20kHz
THD+Noise 10Hz-22kHz
Mic In (min gain) to Bus output 0.006% @ 1kHz
Mic In (max gain) to Bus output 0.008% @ 1kHz
Stereo input to master output 0.005% @ 1kHz
Mic Input E.I.N <-126dBu (150Ω source); 22Hz-22kHz bandwidth, unweighted
Residual Noise <-88dBu Master output; no inputs routed, Mix fader @0dB
CMRR 80dB @ 1kHz
Sampling Frequency 48kHz
Convertor Resolution 24 bit
Latency - Mic Input to Bus output < 1ms @48kHz
DSP Resolution 40-bit floating point
Internal Clock Accuracy < +/- 50ppm
Internal Clock Jitter < +/- 5ns
Input & Output Levels - Mic Inputs +26dBu max
Input & Output Levels - Stereo Input +28dBu max
Input & Output Levels - Bus Outputs +22dBu max
Input & Output Levels - Nominal Operating Level 0dBu (-22dBFS)
Input & Output Impedances - Mic Inputs 6k8Ω
Input & Output Impedances - All other analogue Inputs >10kΩ
Input & Output Impedances - Line Outputs <75Ω
Oscillator 20Hz to 20kHz Sine/Pink Noise, variable level
Channel HP filter 22Hz-1kHz, 18dB per octave
Channel LP filter 500Hz-20kHz, 18dB per octave
EQ (Inputs and Bus Outputs) - HF 22Hz-20kHz, +/-15dB, Q= 0.3-6.0 or Shelving
EQ (Inputs and Bus Outputs) - Hi-Mid 22Hz-20kHz, +/-15dB, Q=0.3-6.0
EQ (Inputs and Bus Outputs) - Lo-Mid 22Hz-20kHz, +/-15dB, Q=0.3-6.0
EQ (Inputs and Bus Outputs) - LF 22Hz-20kHz, +/-15dB, Q= 0.3-6.0 or Shelving
Metering Internal 14-segment LED bargraphs for all Outputs. 12-section plus 9-section gain reduction OLED meters for all Inputs.
Mains Voltage Operating Range 90-264V, 47-63Hz, autoranging
Mains Power Consumption 400W
Operating Temperature 0°C – 45°C (32°F – 113°F)
Relative Humidity 0% – 90%, non-condensing Ta=40°C (104°F)
Storage Temperature -20°C – 60°C (-4°F – 140°F)
Height (Console Only) 340mm (13.4")
Height (with standard shipping carton) 500mm (19.7")
Height (with factory flightcase) 530mm (20.9")
Width (Console Only) 1202mm (47.3")
Width (with standard shipping carton) 1347mm (53.0")
Width (with factory flightcase) 1307mm (51.5")
Depth (Console Only) 817mm (32.2")
Depth (with standard shipping carton) 1010mm (39.8")
Depth (with factory flightcase) 1250mm (49.2")
Weight (Console Only) 38kg (84lb)
Weight (with standard shipping carton) 81kg (178lb)
Weight (with factory flightcase) 132kg (290lb)




Rotary encoders and OLED screens on every channel