Sound Craft Si Expression 1

16-Channel Digital Mixer with Lexicon FX, 66 Mix Inputs & Remote Control

Compact Digital Audio Mixer for Live Sound and Installations

Soundcraft Si Expression 1 is a powerful and compact 16-channel digital mixing console designed for professional live sound, house of worship, broadcast, and installation environments. With 66 mix channels, onboard Lexicon FX processing, and motorized faders with color illumination, it delivers high-end features in a streamlined and intuitive layout.

Soundcraft Si Expression 1 Competitive Differences

• 66 input processing channels with dedicated DSP and 40-bit floating point audio engine
• 4 internal hardware-based Lexicon FX processors with individual FX buses
• 16 mic preamps with 14 faders and full color touchscreen for fast navigation
• Direct Output Gain Stabilization (D.O.G.S.) ensures consistent gain for shared sources
• Remote control via ViSi iPad app over HiQnet Ethernet network
• Assignable channel strip with dedicated rotary encoders for analog-style control
• USB port for saving/loading console settings and presets
• Fully customizable 35 mix buses for extensive routing options
• One-touch TOTEM system for fast FX/aux/matrix mixing

Soundcraft Si Expression 1 Description

The Soundcraft Si Expression 1 brings high-performance mixing capabilities in a compact 19-inch rack-mountable format. Designed to meet the demands of touring engineers and fixed installations alike, it features 16 XLR mic/line inputs, 4 line inputs, AES digital I/O, and expansion options via a 64x64 card slot compatible with Dante, MADI, CobraNet, and more.

Each input channel is equipped with a high-pass filter, delay, gate, compressor, and 4-band parametric EQ. Outputs include 14 aux/group mixes, 4 matrix buses, and 4 dedicated Lexicon FX buses, each with advanced EQ and dynamic processing. The console features illuminated faders and global mode encoders for intuitive hands-on mixing.

With its touchscreen interface, fast access keys, assignable channel strips, and security lockout features, the Si Expression 1 streamlines workflow and ensures reliable performance. The D.O.G.S. system maintains stable direct output levels for consistent monitor mixes, especially useful for in-ear setups. Whether it's in the studio, on tour, or in a house of worship, the Si Expression 1 provides robust, flexible mixing in a compact digital format.

Si Expression 1 Features

• 66 input mix channels with processing
• 16 XLR mic/line inputs + 4 line inputs
• 14 faders with multi-color illumination
• 4 stereo Lexicon FX engines with dedicated mix buses
• Assignable channel strip with dedicated controls
• 28-band graphic EQ on every mix, matrix, and main output
• 35 total mix buses
• Color touchscreen for setup, patching, and labeling
• One Touch Easy Mix (TOTEM) system
• Remote control via ViSi iPad app over HiQnet
• USB port for scene and setting storage
• Copy/Paste functions for quick channel setup
• Function Focus with automatic display updates
• Expansion slot supports Dante, MADI, FireWire/USB, and more

Si Expression 1 Specifications

• Mic Gain Range: -5 dB to 58 dB (1 dB steps)
• Line Gain Range: -10 dB to +16 dB
• Compressor: Threshold -52 to -6 dBFS, Ratio 1:1 to 20:1
• Gate: Threshold -60 to -6 dBFS, Depth -60 to -3 dB
• EQ: 4-band parametric, ±15 dB, 22 Hz – 20 kHz
• 28-band graphic EQ: 31 Hz to 16 kHz
• Audio Delay: Adjustable up to 500 ms
• AD/DA: 24-bit, up to 200 kHz
• Latency: < 0.9 ms total
• Max Input Level: +22 dBu
• Max Output Level: +21.5 dBu
• Headphone Output: 300 mW @ 150 ohms
• Power Consumption: 130W max
• Operating Temperature: 41 to 113°F (5 to 45°C)
• Dimensions: 6.7 x 19 x 20.5 in (169 x 483 x 520 mm)
• Weight: 24.2 lb (11 kg)
• Shipping Dimensions: 28 x 22 x 10 in
• Shipping Weight: 33.45 lb