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 Billie Joe Armstrong uses Radial Engineering SGI TX/RX Studio Guitar Interface

Billie Joe Armstrong

Singer, Guitarist

Green Day

...
Verified via Photo

In this photo of Armstrong's equipment, the Radial SGI TX/RX guitar interface is visible.

See how Mike Kerr uses Radial Engineering SGI TX/RX Studio Guitar Interface

Mike Kerr

Singer, Bassist

Royal Blood

...
Verified via Photo

In this YouTube video of Royal Blood’s Studio Brussels performance at around the 4-58-4:59 mark, one can clearly see Mike using the Radial SGI TX interface.

See how Josh Klinghoffer uses Radial Engineering SGI TX/RX Studio Guitar Interface

Josh Klinghoffer

Singer, Guitarist

Pearl Jam

...
Verified via YouTube

"We use these SGI boxes - Radial SGI boxes… The SGI boxes sit at the back of the rack. We take a second feed off the main head for that. That's as much for show recording as it is for the house," says Josh Klinghoffer's guitar tech.

See how Joe Perry uses Radial Engineering SGI TX/RX Studio Guitar Interface

Joe Perry

Guitarist

Hollywood Vampires

...
Verified via Radialeng

Since adding the Radial JD7, SGI and Headbone to my rig, my sound on stage has never been better!

Joe Perry about his Radial equipment.

See how Nile Rodgers uses Radial Engineering SGI TX/RX Studio Guitar Interface

Nile Rodgers

Singer, Guitarist

Mark Knopfler’s Guitar Heroes

...
Verified via Photo

Visible in this September 18, 2018 still from Rodger's Instagram Live and this August 2019 photo from Rodger's official JAM Pedals artist page.

See how Paul Weller uses Radial Engineering SGI TX/RX Studio Guitar Interface

Paul Weller

Keyboardist, Composer

The Style Council

...
Verified via YouTube

At 0:59 you can clearly see Paul's pedalboard.

See how Scott Holiday uses Radial Engineering SGI TX/RX Studio Guitar Interface

Scott Holiday

Guitarist

Rival Sons

...
Verified via Radialeng

I've been using the Radial SGI and JDXs for a while now... Talked about them bitches in several guitar mags too! ;) SGI is mandatory. Best thing ever for bigger stages and big pedal boards. It's Da pro chit

See how Seth Morrison uses Radial Engineering SGI TX/RX Studio Guitar Interface

Seth Morrison

Guitarist

Skillet

...
Verified via Photo

In an Instagram post by Seth Morrison, the Radial Engineering SGI TX/RX Studio Guitar Interface is visible in the top left corner of his pedalboard, just above the Cusack Screamer, during tour rehearsals.

See how Tommy Lee uses Radial Engineering SGI TX/RX Studio Guitar Interface

Tommy Lee

Drummer

Mötley Crüe

...
Verified via YouTube

In the video "Tommy Lee's Atrium Studio and Smiley Sean Interview" by Produce Like A Pro, Tommy Lee is shown using the Radial Engineering SGI TX/RX Studio Guitar Interface for guitar and bass recordings.

See how Daughter (official) uses Radial Engineering SGI TX/RX Studio Guitar Interface

Daughter (official)

Guitarist

Daughter

...
Verified via Photo

Igor's pedalboard at National Sawdust in Brooklyn NY on 4/4/2016

See how Barry Stock uses Radial Engineering SGI TX/RX Studio Guitar Interface

Barry Stock

Guitarist

Three Days Grace

...
Verified via YouTube

Barry Stock's Radial SGI TXs can be seen at 24:20 in this rig rundown video.

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

John Rzeznik

Singer, Guitarist

Goo Goo Dolls

...
Verified via Radialeng

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

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.

More Radial Direct Boxes

Radial JDI

$220.89 - $269.00

# 2

Rank

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

$110.44 - $135.00

# 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