Radial SGI-RX Guitar Interface System Receiver

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Regular price $179.99 USD

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Radial SGI-RX Replacement Studio Guitar Interface

Studio Guitar Interface SystemThe SGI is a high performance line driver system for guitars that takes an unbalanced instrument signal and allows you to drive it as far as 100 meters (300ft) without noise.

Take your tone furtherThe SGI sends guitar signals across long distances without signal loss or noise, while retaining the original tone of the instrument. In the studio, it allows the guitarist to sit in the control room and connect to a distant guitar amp. On stage, the SGI can be used to play the guitar amp using off-stage isolation cabinets or it can be used to manage guitar signals to and from wireless systems, pedalboards and amplifiers. The SGI consists of two boxes: the SGI-TX transmitter and the SGI-RX receiver. The connection between the TX and RX is made using a standard balanced XLR microphone cable. To use, you simply plug your guitar into the SGI-TX input and connect your amp from the SGI-RX output and you are set to go. The SGI does all of the balancing, buffering and impedance matching for you.

Looking at the SGI specifications is both worthwhile yet deceiving. On one hand, looking at specs such as noise or signal handling will determine the quality of the interface. On the other hand, evaluating application specific devices like the SGI needs to be done by considering the source. A guitar for example tends to be a mid range device with a relatively low output. Ultimately… it comes down to how it actually sounds. And the SGI sounds great!


  • Balanced line driver for guitar and bass
  • Send signal over 100 meters (300ft) without loss
  • 100% discrete class-A circuit with Drag control
  • Delivers natural tone to off-stage amplifiers
  • Indicates the SGI-TX is active when power supply is connected.
  • Load correction allows you to dial-in the proper load for your pickups.


  • Audio circuit type: Active 100% discrete class-A with transformer isolation
  • Frequency response: 20Hz ~ 18kHz (-2dB)
  • Dynamic range: 112dB
  • Total harmonic distortion: 0.005% @ 1k
  • Intermodulation Distortion: 0.04% @ 1k
  • Input Impedance: Variable from 10k Ohms ~ 1 megaOhm
  • Output Impedance: 4.5k Ohms (¼" unbalanced)
  • Noise: -102dBu
  • Maximum Input: +10dBu
  • Ground lift, Drag Control
  • Input Connectors: TX: 1/4" | RX: XLR
  • Output Connectors: TX: XLR | RX: 1/4"
  • General

  • Construction: 14-gauge steel chassis & outer shell
  • Size (L x W x D): Size:2.75" x 4.25" x 1.75" (70 x 108 x 44mm)
  • Weight: 3lbs. (1.36kg)
  • Shipping size (L x W x D): 5" x 2.75" x 10.75" (127 x 70 x 273mm)
  • Shipping weight: 3.2lbs (1.45kg)
  • Power: +15VDC/400mA adapter included
  • Conditions: For use in dry locations only between 5°C and 40°C
  • Warranty: Radial 3-year, transferable


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