Radial SGI Stereo Studio Guitar Interface Line Driver System

The Sanctuary Perspective

The Radial SGI Stereo is a professional line-driver system engineered to extend high-impedance stereo guitar signals over distances up to 300 feet (100 meters) using standard balanced XLR microphone cables, with zero signal loss, high-frequency roll-off, or noise. Ideal for commercial recording studios, large arena stages, and complex rack setups, the SGI Stereo allows guitarists to play in the control room or on stage while driving their stereo pedalboard feeds to remote amplifier isolation booths or off-stage amp vaults with 100% tonal purity.

Product Intelligence & Signal Engineering Profile

• Best For: Professional Recording Studios, Remote Isolation Booth Routing, Arena & Festival Stages, Complex Stereo Pedalboard-to-Amp Rigs, and Long Cable Distance Signal Transfer.
• Sound Character: Completely transparent and uncolored with full frequency restoration, zero high-end capacitance dulling, and dead-quiet ground isolation.
• Compared To: Upgrades standard guitar buffering by converting high-impedance unbalanced signals to active low-impedance balanced XLR lines at the transmitter (SGI-TX), then converting back to hi-Z at the passive receiver (SGI-RX), preserving 100% pick attack over long runs.
• Sanctuary Expert Note: "High-frequency signal loss and cable capacitance are the enemy of great guitar tone when cable runs exceed 20 feet. The SGI Stereo lets you place your tube amps in an isolated room 250 feet away while maintaining the exact feel, load, and pick dynamics as if you were plugged directly into the front panel with a 10-foot cable."

Key Features & Technical Highlights

• Complete Transmitter & Receiver System: Includes both the active SGI-TX Stereo Transmitter unit for pedalboard/stage mounting and the passive SGI-RX Stereo Receiver unit for placement at your amplifier rig.
• Extended 300-Foot Transmission: Drive high-impedance stereo signals across massive distances using standard balanced 3-pin XLR snake or mic lines.
• Drag Control Load Correction: Features Radial's variable Drag Control load correction on the transmitter to fine-tune pickup impedance loading, restoring the natural tone and feel of plugging directly into an amplifier.
• 100% Transformer Isolated Receiver: Built with custom Radial isolation transformers inside the receiver unit to eliminate ground loops and 60-cycle hum between distant power sources.
• Ground Lift Switches: Integrated ground lifts on both channels eliminate stray electrical currents and ground loops instantly.
• 14-Gauge Heavy-Duty Construction: Housed inside Radial's signature roadworthy steel enclosures to handle the demands of touring and daily studio use.

Technical Specifications

• Audio Circuit Type: Active Low-Noise Transmitter (SGI-TX) with Passive Transformer Isolated Receiver (SGI-RX)
• Number of Channels: 2 (Stereo or Dual Mono)
• Frequency Response: 20Hz – 20kHz (± 0.5dB)
• Dynamic Range: 118dB
• Total Harmonic Distortion (THD): 0.002% @ 1kHz
• Transmitter Inputs: 2 x 1/4" Unbalanced High-Z (1MΩ / Drag Control Adjustable)
• Transmitter Outputs: 2 x XLR Balanced Low-Z
• Receiver Inputs: 2 x XLR Balanced Low-Z
• Receiver Outputs: 2 x 1/4" Unbalanced High-Z
• Controls: Drag Control Variable Load Adjust (Transmitter), Ground Lift Switches (Receiver)
• Power Requirement: 15VDC Power Supply Included (Transmitter Unit Only; Receiver is 100% Passive)
• Chassis: 14-Gauge Heavy Duty Steel