Pricing and availability

We compare 600+ stores and found this item at 10 stores. Prices updated .

Guitar Center
5.0 (1)
$329.99
Amazon
5.0 (31)
$349.99
Reverb
$125.00 New
$123.00 Used
Musician's Friend
4.0 (3)
$329.99
Thomann
4.7 (22)
$344.00
Gear4Music
£335.00

Average Price: $284

Standard/Professional

$119

$300+

Price Tier

Budget

Standard

High-end

Price History

Based on price data from 7 merchants for "Radial Engineering SGI TX/RX Studio Guitar Interface". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

* Product prices and availability are updated by Equipboard every 24hrs and are subject to change. Equipboard may receive compensation for purchases made at participating retailers linked on this site. This compensation does not affect what products or prices are displayed, or the order of prices listed. For more information, please refer to our affiliate disclosure.

Description

When it comes to bridging the gap between your guitar and amplifier over long distances, the Radial Engineering SGI TX/RX Studio Guitar Interface stands as a reliable solution. Designed for both studio and stage environments, this ingenious 'send & receive' system lets you run your guitar signal up to 300 feet away without any loss of quality. The SGI system consists of two robust modules: the SGI TX transmitter and the SGI RX receiver, connected via standard XLR cables.

The SGI TX is equipped with 100% discreet Class A active circuitry, mirroring the high-fidelity design of Radial's renowned JD7 Injector. This ensures your guitar's natural tone remains unharmed by eliminating zero-cross distortion, while the unique Drag Control load correction circuit reintroduces the authentic interaction between guitar and amp. This is perfect for guitarists who double as engineers, allowing them to stay in the control room and listen to their sound in real-time over studio monitors.

The receiver, SGI RX, is passive and doesn't require power, further eliminating hassles during setup. With transformer isolation in both modules, buzz and hum from ground loops are effectively eliminated. Encased in a 14-gauge steel chassis with Radial’s I-Beam construction, the SGI is built to withstand the rigors of live performances and studio sessions alike, ensuring years of dependable use.

Key Features:

  • Drive a guitar signal up to 300 feet without loss
  • 100% discreet Class A electronics for superior sound quality
  • Drag Control pickup load correction for natural tone preservation
  • Transformer isolated to eliminate noise
  • Utilizes standard balanced XLR cables
  • SGI-TX: 1/4" hi-Z input with Drag control; Balanced XLR-M output
  • SGI-RX: Balanced XLR-F input; 1/4" hi-Z output
  • Ground lift option on SGI-RX to eliminate hum
  • Includes 15VDC power supply for SGI-TX module
  • Sturdy 14-gauge steel construction with protective design

Product specs

Available since September 2006
Multi-Channel Unit No
Channels 1
Active / Passive Active
19" No
Pad switchable No
Gnd/Lift switchable Yes
Powered by battery No
Speaker Simulation Yes

FAQs

What is the primary function of the Radial Engineering SGI TX/RX Studio Guitar Interface?

The Radial Engineering SGI TX/RX Studio Guitar Interface is designed to send guitar signals over long distances without signal loss, making it ideal for studio environments where the guitar player is far from the amplifier.

Does the Radial SGI require external power?

Yes, the Radial SGI is an active device and requires an external power source to operate effectively, ensuring optimal signal integrity over long cable runs.

Can the Radial Engineering SGI TX/RX be used with bass guitars?

Yes, the Radial Engineering SGI TX/RX can be used with bass guitars, providing clear and accurate signal transmission over extended cable lengths.

Is the Radial SGI suitable for live performances?

While primarily designed for studio use, the Radial SGI can also be used in live settings to maintain signal quality over long distances between the stage and the mixing console.

Does the Radial Engineering SGI have a ground lift switch?

Yes, the Radial Engineering SGI features a ground lift switch to help eliminate hum and buzz caused by ground loops in your signal chain.

Full Compass

Full Compass

Radial Engineering SGI Studio Guitar Interface System Overview | Full Compass

Video thumbnail for Radial Engineering SGI Studio Guitar Interface System Overview | Full Compass by Full Compass

Radial Engineering SGI Studio Guitar Interface System Overview | Full Compass

Full Compass

Full Compass

Video thumbnail for Spotlight: Radial SGI by Worship and Production

Spotlight: Radial SGI

Worship and Production

Worship and Production

Video thumbnail for Radial Engineering DiNET DAN-TX and DAN-RX Dante Direct Boxes | Full Compass by Full Compass

Radial Engineering DiNET DAN-TX and DAN-RX Dante Direct Boxes | Full Compass

Full Compass

Full Compass

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 Radial SGI boxes review and demo by prospect_studios

Radial SGI boxes review and demo

prospect_studios

prospect_studios

Reviews

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

The Radial Engineering SGI TX/RX Studio Guitar Interface is praised for its robust build and practical design, making studio sessions faster and more efficient. While it lacks level controls, its plug-and-play simplicity and negligible impact on tone impress users. The handy impedance and ground-lift features offer flexibility, though some might find the lack of tonal variation a downside. Overall, it's a problem-solving tool that enhances studio workflow without compromising sound quality.

positive

Radial Engineering SGI Guitar Interface – The Audio Magazine

theaudiomagazine.com

The Radial SGI TX/RX Studio Guitar Interface is a game-changer for long cable runs, eliminating noise and maintaining tone integrity over 500 feet of cable. Its robust build and ease of use are standout features, and the Drag control adds tonal flexibility. Though a slight volume drop and tonal shift occur, they are barely noticeable, making this a highly recommended tool for guitarists and bassists.

positive

5.0 out of 5

Based on 1 Review and 2 Ratings

5 star
4 star
3 star
2 star
1 star
matthewfuqua

Consistent

Everything Radial makes is excellent! This is no exception.

Artist usage

Add artist
See how Steve Miller uses Radial Engineering SGI TX/RX Studio Guitar Interface

Steve Miller

Singer, Guitarist

Steve Miller Band

...
Verified via Vintage Guitar® magazine

In the Vintage Guitar Magazine article in September 2010, Steve states that he uses a Radial SGI Single Line when playing live: " Everything’s plugged into a Voodoo Power supply and there’s a Radial SGI single-line transformer."

See how James Duke uses Radial Engineering SGI TX/RX Studio Guitar Interface

James Duke

Guitarist, Composer

...
Verified via Photo

In an Instagram post by thejamesduke, James Duke is shown using the Radial Engineering SGI TX/RX Studio Guitar Interface.

See how Clemens Rehbein uses Radial Engineering SGI TX/RX Studio Guitar Interface

Clemens Rehbein

Singer, Guitarist

Milky Chance

...
Verified via YouTube

At 12:08 Milky Chance's tech explains the functionlity of the SGI on Clemens's board.

See how John Flansburgh uses Radial Engineering SGI TX/RX Studio Guitar Interface

John Flansburgh

Guitarist

They Might Be Giants

...
Verified via Mixonline

Flansburgh’s footpedal gear includes the Radial SGI TX and SGI RX, Boss Noise Suppressor NS-2, Electro-Harmonix micro POG, MXR micro flanger and Semaphore tremolo.

See how Igor Haefeli uses Radial Engineering SGI TX/RX Studio Guitar Interface

Igor Haefeli

Guitarist, Bassist

Daughter

...
Verified via YouTube

At 22.06 minute mark, 2 Radial SGI TX interfaces can be seen below Radial ProD2 boxes.

See how Carl Broemel uses Radial Engineering SGI TX/RX Studio Guitar Interface

Carl Broemel

Guitarist

My Morning Jacket

...
Verified via Premier Guitar

In the "My Morning Jacket Rig Rundown" by Premier Guitar, hosted by John Bohlinger, it is documented that Carl Broemel utilizes two Radial Engineering SGI TX/RX Studio Guitar Interfaces as part of his setup.

See how Joshua Taylor uses Radial Engineering SGI TX/RX Studio Guitar Interface

Joshua Taylor

Singer, Guitarist

Half Alive

...
Verified via Photo

In this photo, which comes from Half Alive's show source, Taylor's pedalboard can be seen. One of the items Taylor uses is the Radial SGI TX/RX interface.

See how Brent Kutzle uses Radial Engineering SGI TX/RX Studio Guitar Interface

Brent Kutzle

Bassist

OneRepublic

...
Verified via Photo

"Both bass and cello are run from the back of the rig via Radial SGIs down to the pedalboards from the Shure ULX wireless units in the rack" - Mix Online.

See how Clint Black uses Radial Engineering SGI TX/RX Studio Guitar Interface

Clint Black

Guitarist, Music Producer

R.A.D.D. (Recording Artists Against Drunk Driving)

...
Verified via Radialeng

On Radial's website, Black is mentioned as user of this interface. He says : "I've found the Radial ProRMP Reamper useful many times in taking a second approach to my tone on a record. It also helps in live situations when applied with the SGI. The distance from my wireless rig to the pedal board and then to the amp is considerable. It helps keep my signal strong, clean and with great tone quality!"

See how Tom Blankenship uses Radial Engineering SGI TX/RX Studio Guitar Interface

Tom Blankenship

Bassist

My Morning Jacket

...
Verified via Premier Guitar

According to John Bohlinger in the "My Morning Jacket Rig Rundown" by Premier Guitar, Tom Blankenship utilizes the Radial Engineering SGI TX/RX Studio Guitar Interface to maintain a clean signal in his setup.

See how Jim Messina uses Radial Engineering SGI TX/RX Studio Guitar Interface

Jim Messina

Singer, Guitarist

Buffalo Springfield

...
Verified via Radialeng

On Radial's website, Messina was mentioned as user of Radial SGI Guitar Interface.

See how Patrick Simmons uses Radial Engineering SGI TX/RX Studio Guitar Interface

Patrick Simmons

Singer, Guitarist

The Doobie Brothers

...
Verified via YouTube

The item can be seen 38:05 into this video, at the top right.

Genre Usage

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

Used With

Based on how musicians on Equipboard use Radial Engineering SGI TX/RX Studio Guitar Interface, it is most commonly used with the following gear.

Voodoo Lab Pedal Power 2 PLUS
Voodoo Lab Pedal Power 2 PLUS Effects Pedal Accessories
4
Fulltone OCD
Fulltone OCD Overdrive Effects Pedals
3
Electro-Harmonix POG2 Polyphonic Octave Generator
Electro-Harmonix POG2 Polyphonic Octave Generator Harmonizer & Octave Effects Pedals
3
Fulltone FatBoost 3 FB-3
Fulltone FatBoost 3 FB-3 Boost Effects Pedals
2
Ibanez TS808 Tube Screamer
Ibanez TS808 Tube Screamer Overdrive Effects Pedals
2
Strymon TimeLine
Strymon TimeLine Delay Effects Pedals
2
Ibanez TS9 Tube Screamer
Ibanez TS9 Tube Screamer Overdrive Effects Pedals
2

More Radial Direct Boxes

Radial JDI

$220.73 - $268.00

# 2

Rank

Matt Heafy Adrian Belew Matthew Healy
29 artists using
Radial Pro 48

$110.36 - $134.99

# 20

Rank

Jake Bugg Martin Carthy Thomas Ramdhan
4 artists using
Radial Pro D8

$1,029.99 - $1,166.00

# 97

Rank

Devin Townsend Max Weinberg Dizzy Reed
5 artists using

Accessories & Related Items

Community setups

Similar

Gear Guides