Radial Engineering SGI
Studio Guitar Interface System


Our Price: $259.99
List Price: $300.00
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The Radial SGI studio guitar interface allows a guitar signal to travel 100 meters (328 feet) over a standard balanced XLR mic cable. This enables the guitarist to play through a distant amplifier while listening to the performance in the control room. On large stages, the SGI allows a guitar signal to travel from the wireless system to a pedal board and amplifier.

The SGI employs a proprietary drive and balancing circuit that is made up of two modules: the SGI-TX transmit module and SGI-RX receive module. The SGI-TX is active with 100% discreet class-A circuitry and Drag™ control load correction to ensure the most natural sound. The SGI-RX is completely passive. To eliminate hum and buzz caused by ground loops, each module is equipped with isolation transformers that are wired in opposing directions to counteract any artifact. Best of all, the SGI is plug & play easy to use and comes equipped with power supply.


  • Drive a guitar signal 300 feet without loss
  • 100% discreet class-A electronics
  • Drag Control pickup load correction
  • Transformer isolated to eliminate noise
  • Routes using standard balanced XLR cable


  • Circuit type: Active class-A circuit - transformer isolated
  • SGI-TX high-Z input: ¼ jack - buffered - with Drag™ control load correction circuit
  • SGI-TX output: Balanced XLR-M output
  • SGI-RX input: Balanced XLR-F input
  • SGI-RX high-Z output: ¼" jack
  • Transformers: Radial special design 1:1 transformers on TX and RX
  • Ground lift: Yes - LIFT switch on SGI-RX
  • Power supply: Included - 15VDC 400ma , center +
  • Construction: 14 gauge steel chassis and outer shell, baked enamel finish
  • Size (TX and RX): 4.25"d x 2.75"w x 2.38"h (107 x 70 x 43mm)
  • Weight: TX - 1.1 lb (0.5 kg), RX - 1.1 lb (0.5 kg)

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