Product details

The SPL Audio SMC 7.1 is a professional analog surround monitor controller engineered for film post-production, immersive audio workflows, music studios, and critical listening environments. Supporting both 7.1 surround and stereo monitoring, it combines eight-channel analog volume control with flexible source routing, individual loudspeaker management, and a dedicated headphone amplifier. Its precision analog circuitry maintains a wide frequency response and high dynamic range, allowing audio professionals to compare mixes, isolate individual channels, and evaluate surround productions with confidence.

Key Features

8-Channel Analog Volume Control: Controls all eight channels of a 7.1 speaker system simultaneously using a precision eight-gang potentiometer.
Dual 7.1 Inputs: Connect two balanced 7.1 surround sources for direct comparison between productions or playback systems.
Dual Stereo Inputs: Accommodates two additional balanced stereo sources for reference playback and conventional stereo monitoring.
Flexible Speaker Management: Individually switch each loudspeaker on or off, with the controller remembering the last speaker configuration used for each source.
Solo-In-Place Function: Isolates an individual loudspeaker while retaining its physical position in the surround setup, helping engineers evaluate channel-specific audio.
Solo-To-Center Function: Routes a selected loudspeaker channel to the center speaker for focused critical listening from the front.
Alternative Stereo Speaker Output: Routes the selected source’s left and right channels to a separate stereo speaker pair for comparison with the main surround system.
Integrated Headphone Amplifier: Provides a front-panel 6.35 mm (¼-inch) headphone connection with a dedicated volume control.
Individual Channel Headphone Monitoring: Allows monitoring of the selected stereo signal or individual channels from the 7.1 inputs.
LFE Routing for Stereo Sources: The LFE function allows a subwoofer to be incorporated into stereo monitoring.
Dedicated Meter Output: Supplies an analog monitoring signal for connecting external metering equipment.
Phase and Mono Evaluation: Mono left/right monitoring functions support compatibility checks and troubleshooting of surround and stereo mixes.
Rapid Mute Control: Quickly silences the monitor outputs to protect loudspeakers and hearing if unwanted signals occur.
High-Headroom Analog Circuitry: Operates at ±18 V internally, supporting clean signal handling and a broad dynamic range.
Internal Linear Power Supply: Uses a toroidal transformer for stable analog operation.
Professional Construction: Manufactured in Germany, with a robust desktop design that can also be installed in an optional 19-inch Expansion Rack.

Technical Specifications

Product Type: Analog 7.1 surround and stereo monitor controller
Surround Channels: 8 channels
Balanced Surround Inputs: 2 × 7.1 inputs via DB25 and/or balanced XLR connections, depending on configuration
Stereo Inputs: 2 × balanced stereo inputs
Main Surround Output: 8-channel balanced output
Alternative Speaker Output: Balanced stereo output
Subwoofer Output: Dedicated LFE/subwoofer connection
Meter Output: Dedicated analog output
Headphone Output: 1 × 6.35 mm (¼-inch) stereo TRS
Maximum Input Level: +22 dBu
Input Impedance: 20 kΩ
Output Impedance: 100 Ω
Frequency Response: 10 Hz – 150 kHz (−3 dB)
THD + N: 0.001% (10 Hz–22 kHz, 0 dBu)
Noise: −93 dBu (A-weighted)
Crosstalk: −92 dB at 1 kHz
Common-Mode Rejection: 82 dB at 1 kHz
Dynamic Range: 115 dB
Headphone Frequency Response: 10 Hz – 80 kHz (−3 dB)
Headphone Output Impedance: 22 Ω
Analog Operating Voltage: ±18 V
Mains Supply: 115 V AC / 60 Hz or 230 V AC / 50 Hz, selectable
Power Consumption: Maximum 30 W
Dimensions (W × H × D): 278 × 100 × 330 mm
Unit Weight: Approximately 4.1 kg
Manufacturing Origin: Germany