The Soundcraft Si Expression 2 Digital Mixer is a digital mixing console designed for live sound applications. The mixer features 24 microphone preamps, 4 line inputs, AES in, 4 internal stereo FX returns, 22 faders, a 64 x 64 expansion slot for additional routing possibilities, and 66 input processing channels.
Every input processing channel on the board can be routed through a dedicated high-pass filter, input delay, compressor, gate, and four-band equalizer. Each channel is also under the control of an automation system with four mute groups and illuminated faders to keep track of signal processing. For outputs, the mixer includes 16 balanced line outputs, a headphone monitor output, AES output, and the 64 x 64 expansion slot.
SOUNDCRAFT Si Expression 2
Key Specifications
Rack Mountable
No
Signal Processing
Gain/Trim Range
Mic: -5 dB to 58 dB (in 1 dB Steps) Line: -10 dB to +16 dB
EQ Parameters
1x HF Shelf: ±15 dB at 800 Hz to 20 kHz 2x MF Notch/Peak: ±15 dB at 22 Hz to 20 kHz, 6 to 0.3 Q 1x LF Shelf: ±15 dB at 20 Hz to 500 Hz
Graphic EQ
28-Band 1/3 Octave, 31 Hz to 16 kHz
Filters
High-Pass: 40 Hz to 1 kHz
Audio Delay
Adjustable Up to 500 ms
Digital Audio
Sample Rates
AD/DA Conversion: Up to 200 kHz
Bit Depth
AD/DA Conversion: 24-Bit
Word Clock Input
48 kHz ±7 Hz
Performance
Frequency Response
Mic/Line Input: 20 Hz to 20 kHz ±1.5 dB
Max Input Level
Mic Input: +22 dBu Line Input: +22 dBu
Headphone Output Power
300 mW into 150 Ohms
I/O Impedance
Mic Input: 3 Kilohms Line Input: 10 Kilohms AES3 Input: 110 Kilohms Output: 150 Ohms (Balanced) 75 Ohms (Unbalanced) Word Clock Output: 50 Ohms Word Clock Input: 47 Kilohms AES3 Output: 110 Ohms
Noise Floor
< -86 dBu < -86 dBu (at Unity Gain)
THD
< 0.01%
Power
Input Power
88 to 264 VAC, 50 / 60 Hz
Physical
Rack Mountable
No
Packaging Info
Package Weight
47 lb (21.32 kg)
Box Dimensions (LxWxH)
33 x 27 x 11" (838.20 x 685.80 x 279.40 mm)
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