Product Overview

The Analog Command Hub for Precision 7.1 Multi-Channel Monitoring

The SPL SMC 7.1 represents the next tier in multi-channel speaker management, expanding on the legendary SMC 5.1 layout to accommodate immersive 7.1 speaker configurations. To prevent the loss of digital resolution caused by software master faders or digital control panels, the SMC 7.1 handles all volume tracking in the pure-analog domain. Hand-built in Germany with elite audio components, it provides studio engineers with a zero-latency, high-headroom command desk to route and switch seamlessly between immersive multi-channel stems and secondary stereo reference formats.

Product Description

Eight-Ganged Master Volume Control for Perfect Phase Integrity:

The core element of the SMC 7.1 circuit is its custom-engineered 45mm all-aluminum rotary knob, which drives a highly specialized eight-level (eight-ganged) analog potentiometer. Rather than relying on VCA or digital control circuits that can introduce color or artifact distortion, this robust mechanical system attenuates all eight audio channels simultaneously. This operational layout guarantees absolute phase linearity and exceptional left-to-right/front-to-rear channel level matching across the entire attenuation curve, preventing spatial image drift inside your listening space.

Flexible 7.1 and Stereo Routing Framework:

The rear panel provides exhaustive connectivity options for dual-source tracking, allowing engineers to compare two separate productions at the push of a button. It features two balanced 7.1 surround inputs alongside two separate balanced stereo inputs, accessible via a combination of space-saving TASCAM-standard DB25 (Sub-D) connectors and professional Neutrik XLR jacks. For stereo sources, a dedicated LFE button lets you instantly route sub-bass frequencies into an active subwoofer, making it simple to flip between full multi-channel playback and a standard 2.1 cross-check arrangement.

Elite Solo-In-Place and Solo-To-Center Troubleshooting Tools:

The tactile front panel serves as an advanced structural diagnostic dashboard. Each loudspeaker can be engaged or disabled individually using illuminated hardware buttons, with the unit automatically remembering your last-used speaker setup for each source. Activating the Solo-In-Place function turns these speaker switches into dedicated solo keys, allowing you to isolate individual speaker positions in space. Concurrently, the innovative Solo-To-Center function routes any selected surround channel directly onto your center speaker, ensuring you can audit critical channels head-on.

High-Voltage Internal Rails and Heavy-Duty Performance:

Built for maximum durability and studio longevity, the SMC 7.1 features a heavy-duty metal housing with a thick, premium aluminum front panel. The unit can also be housed inside an optional 19-inch Expansion Rack to mount directly into your outboard gear bay. Powered by an internal linear power supply with a shielded toroidal transformer, the analog circuitry runs on a high-spec $\pm$18 Volt audio rail. This high-voltage architecture supports massive input levels up to +22 dBu, passing large, uncompressed audio peaks to your active monitors with flawless transparency and an exceptional 115 dB dynamic range.

Key Features

• Mastering-Grade Pure Analog Signal Path: Keeps your 7.1 multi-channel mix completely uncolored, preserving digital bit depth from software fader degradation.

• Eight-Ganged Master Potentiometer: Premium 45mm aluminum volume control ensures absolute level matching and phase integrity across all 8 channels.

• Dual 7.1 and Stereo Input Options: Accommodates two independent 7.1 surround arrays and two stereo sources simultaneously for fast reference switching.

• Advanced Solo-In-Place Diagnostics: Instantly isolates any surround speaker within its true physical position to scan for masking or phase anomalies.

• Innovative Solo-To-Center Routing: Safely maps any single channel onto your front center monitor for close, critical listening of specific positional signals.

• LFE Subwoofer Expansion for Stereo: Front-panel LFE toggle instantly links a subwoofer into your stereo inputs to emulate a 2.1 playback rig.

• High-Voltage $\pm$18V Power Rails: Toroidal transformer infrastructure drives internal voltage to deliver clean headroom up to +22 dBu with an ultra-low 0.001% THD.

• Dedicated High-Quality Headphone Output: Built-in discrete headphone stage features an independent volume potentiometer to monitor stereo line layers cleanly.

Specifications

Analog inputs & outputs; XLR & DB25 (balanced)

Maximum input

22 dBu

Input impedance

20 kΩ

Output impedance

100 Ω

Frequency range (-3 dB)

10 Hz – 150 kHz

THD +N (10 Hz – 22 kHz, 0 dBu)

0.001 %

Noise (A-weighted)

-93 dBu

Crosstalk (1 kHz)

-92 dB

Common mode rejection (1 kHz)

82 dB

Dynamic range

115 dB

Standard Headphones Output, 6.35 mm (1/4") TRS Jack

Wiring

Tip = Left, Ring = Right, Sleeve = GND

Frequency range (-3dB)

10 Hz – 80 kHz

Crosstalk (1 kHz)

-70 dBu

Total harmonic distortion (0 dBu, 1 kHz, 40 kΩ load)

0.001 %

Noise (A-weighted)

-93 dBu

Dynamic range

115 dB

Internal Linear Power Supply with Toroidal Transformer

Operating voltage for analog audio

+/- 18 V

Operating voltage for relays and LEDs

+12 V

Mains Power Supply

Mains voltage (selectable, see fuse chamber)

230 V AC / 50; 115 V AC / 60 Hz

Sicherung für 230 V

T 500 mA

Sicherung für 115 V

T 1 A

Power consumption

max. 30 W

Maße & Gewicht

W x H x D (width x height x depth)

278 x 100 x 330 mm

11 x 4 x 13 inch

Unit weight

4.1 kg

9.04 lbs

Shipping weight (incl. packaging)

5.4 kg

11.9 lbs

Reference: 0 dBu = 0,775V. All specifications are subject to change without notice.