Pricing and availability

We compare 600+ stores and found this item at 8 stores. Prices updated .

Reverb
5.0 (13)
$309.02 New
$150.00 Used
Thomann
5.0 (1)
$338.00 $333.00 $5.00 · All time low

Average Price: $321

High-end/Boutique

$119

$300+

Price Tier

Budget

Standard

High-end

Price History

Based on price data from 7 merchants for "Radial SGI Instrument Line Driver System for Guitar and Bass". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

For musicians who demand pristine sound across vast distances, the Radial SGI Instrument Line Driver System is your ideal companion. This professional-grade system bridges the gap between your guitar or bass and your stage or studio setup, extending unbalanced signals up to 300 feet without compromising on clarity. The SGI system comprises the active SGI-TX transmitter and the passive SGI-RX receiver, linked by a standard balanced XLR cable to ensure seamless long-distance transmission.

At the heart of this system are premium Jensen isolation transformers, which work tirelessly to maintain a wide, flat frequency response while eliminating dreaded ground-loop noise. The SGI-TX features a handy Drag control, allowing you to fine-tune the load on your guitar’s pickups for optimal tonal balance, while the SGI-RX includes a Ground Lift button to eradicate hum and hiss from your signal chain. This setup is perfect for studio recording, allowing you to play in the control room while hearing the precise output through monitors.

Built to endure the rigors of both studio and stage, the SGI system boasts a rugged 14-gauge steel chassis with welded I-beam construction, ensuring it can withstand whatever your musical journey throws at it. With multiple power options and compatibility with standard pedalboard power supplies, this line driver system is as versatile as it is reliable.

Key Features:

  • Extends unbalanced signals up to 300 feet via balanced XLR
  • Includes SGI-TX transmitter and SGI-RX receiver
  • Premium Jensen transformers for top-tier signal integrity
  • Drag control on SGI-TX for optimal pickup load
  • Ground Lift button on SGI-RX to eliminate noise
  • Durable 14-gauge steel construction
  • Compatible with 9 to 15V pedalboard power supplies
  • Ideal for studio and live performance environments

Product specs

Type Line Driver System
Channels 1
Ground Lift Yes
Inputs 1 x 1/4" (instrument), 1 x XLR (receive)
Outputs 1 x 1/4" (Hi-Z out to Amp), 1 x XLR (transmit)

FAQs

How far can the Radial SGI transmit guitar or bass signals without losing quality?

The Radial SGI can transmit guitar or bass signals up to 300 feet without noise or distortion, thanks to its balanced line driver system.

What is the purpose of the Drag control on the Radial SGI?

The Drag control reintroduces the natural tone often lost when using buffered inputs, ensuring your instrument retains its authentic sound.

Can the Radial SGI be used to connect a guitar to an amp over long distances?

Yes, the Radial SGI allows you to connect a guitar to an amp over long distances using standard mic cables, maintaining signal integrity.

Does the Radial SGI help reduce noise in the signal path?

Yes, the Radial SGI includes a ground lift feature that helps reduce noise, ensuring a clean signal path.

What type of transformers are used in the Radial SGI to preserve tone?

The Radial SGI utilizes premium Jensen transformers to preserve the tone and nuance of your instrument across the bandwidth.

Radial Engineering

Radial Engineering

Take your tone further with the Radial SGI.

Video thumbnail for Take your tone further with the Radial SGI. by Radial Engineering

Take your tone further with the Radial SGI.

Radial Engineering

Radial Engineering

Video thumbnail for Play Further From Your Guitar Amp - Radial SGI System by the DAW Studio

Play Further From Your Guitar Amp - Radial SGI System

the DAW Studio

the DAW Studio

Reviews

PROS

  • Eliminates signal loss over long cable distances

  • Maintains clear sound quality, especially in high frequencies

  • Essential for reducing stage noise in live settings

  • Allows amps to be placed far from the stage

  • Ideal for recording in isolation booths without noise interference

CONS

  • Power adapter can disconnect if not securely plugged in

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Radial SGI Instrument Line Driver System for Guitar and Bass.

Features and functionality

  • The Radial SGI Line Driver includes a buffer to maintain signal integrity over long cable runs, crucial for preventing tone loss in guitar signals.

    Source
  • High-quality audio transformers, such as 600 Ohm 1:1 Jensens, are recommended for effective signal balancing and isolation in the SGI system.

    Source
  • A balanced send requires a balanced receiver; otherwise, using a long unbalanced cable might suffice for certain setups.

    Source
  • The inclusion of a "ground lift" switch is essential for effective DI box performance, allowing the ground to be isolated from the XLR line.

    Source

Use cases and applications

  • The SGI is ideal for studio setups where guitars are played in the control room while amps are located in a separate live room.

    Source
  • Galvanic isolation is key for breaking ground loops, although it doesn't significantly reduce high-frequency interference.

    Source

Critic Reviews

Radial Engineering: SGI Studio Guitar Interface system | Tape Op Magazine | Longform candid interviews with music producers and audio engineers covering mixing, mastering, recording and music production.

tapeop.com

A studio lifesaver for guitarists and engineers alike, the Radial SGI Instrument Line Driver System shines in efficiency and ease of use. This no-frills system effortlessly bridges long distances without sacrificing tone, making it ideal for hectic studio sessions. While purists might nitpick about tone authenticity, most users won't hear a difference, even over extensive cable runs. The unit's simplicity—lacking complex controls yet offering a useful ground-lift switch—ensures a "plug and play" experience. Built with Radial's trademark ruggedness and quality, it deftly solves studio challenges, allowing musicians and techs to focus on creativity rather than cabling woes.

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Genre Usage

Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.

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