SGI TX by Radial Engineering is the only high-performance TX transmission module of the line driver for guitars or bass, consisting of a TX transmission unit and an RX reception unit. The complete system can pick up an unbalanced signal and send it up to 100 meters away using a common balanced XLR cable without loss of signal quality or tone. SGI TX can also be easily installed in guitar setups and powered with standard 9V adapters.

Key Features

• Balanced Line Driver TX transmission unit for guitar and bass


• Sends the signal up to 100 meters (300ft) without loss


• Jensen transformers for optimal sound quality


• Does not alter the natural tone of instruments or amplifiers


• Can be powered by standard 9V pedalboard power supplies

Does not alter the instrument's tone

SGI TX sends guitar or bass signals over long distances without signal loss or noise, maintaining the instrument's original tone. In the studio, it allows the guitarist to sit in the control room and connect to a distant guitar amplifier. On stage, the SGI TX can be used to transmit the sound of the guitar amplifier using an off-stage isolation cabinet or to manage guitar signals to and from wireless systems, pedalboards, and amplifiers.

Front and rear panel layout

1. Power indicator light


2. Drag control adjusts pickup sensitivity level


3. Guitar or bass signal input standard 1/4'' Jack connector


4. Balanced signal output XLR connector

How it works

The complete SGI system consists of two elements: the SGI-TX transmitter and the SGI-RX receiver. The connection between TX and RX is made using a standard balanced XLR microphone cable. To use it, simply connect the guitar to the SGI-TX input and the amplifier to the SGI-RX output, and you're good to go. SGI TX uses a discrete buffer circuit to drive signals over long distances, while the SGI RX captures the signal and converts it to the appropriate impedance to power the amplifier while maintaining the original tone.

Jensen Transformer

The SGI system now features Jensen transformers for superior audio quality: one on the SGI TX and one on the SGI RX. These transformers not only provide isolation to prevent hum and ground loop noise, but they are a fundamental part of the circuit that converts the signal at each end of the system. The use of industry-leading Jensen transformers in the SGI helps achieve a wider and flatter frequency response, lower noise and distortion, improved dynamic range, and a higher signal-to-noise ratio. All of this contributes to cleanly transmitting audio over long distances without altering the original signal.

Compatible with pedalboards

SGI TX comes with an included 15V power supply to power the TX transmission unit, but it can also be used with standard pedalboard power supplies, making integration easier. Any 9V to 15V power supply can be used, and both positive and negative center pin polarities are accepted.

Note: This is only valid for the latest SGI model with "Jensen Equipped" written on the top of the unit.

SGI Applications

SGI is the perfect interface for studio recording. Now you can sit in the control room and play guitar, listening to the monitors in the control room while you play. Simply plug your guitar into the SGI-TX, run a balanced cable to the SGI-RX, and play at full volume!

Using Radial SGI on stage

SGI offers a ready-made solution for large stages, where high-impedance guitar signals are often affected by the capacitance of long cables or noise from lighting systems. SGI balances the signal and delivers it without interference. Perfect for isolation cabinets, under-stage amplifiers, or quiet remote rooms.

A solution for complex routing systems

SGI can also be used to manage complex stage setups. You can route the signal from the wireless receiver to the pedalboard; then, use a second unit to return the signal to the guitar amplifier and push the signals as far as needed without introducing noise.

SGI TX Technical Specifications

• Audio Circuit Type: Discrete buffered signal path with transformer isolation


• Transformer: Jensen JT-11-YPMC


• Frequency Response: 10Hz - 40kHz (±0.5dB)


• Dynamic Range: 121.4 dB


• Total Harmonic Distortion: 0.0013% at -20dBV, 22Hz to 22kHz


• Intermodulation Distortion: 0.01%, 60Hz/7kHz, 4:1, -20dBV


• Input Impedance: Variable from 22k-422kΩ (depends on drag control)


• Output Impedance: 2.2kΩ (¼” unbalanced)


• Signal-to-Noise Ratio: 95.7 dB


• Maximum Input: +8.5dBu, 1% THD+N, unbalanced

Features

• Ground Lift


• Drag Control (corrects the response of the connected instrument's pickup)


• Input Connectors: TX: 1/4” | RX: XLR


• Output Connectors: TX: XLR | RX: 1/4”

General

• Construction: 14-gauge steel chassis and outer shell


• Dimensions (W x D x H): 70 x 108 x 44 mm (2.75“x 4.25” x 1.75”)


• Weight: 1.36 kg (3 lbs)


• Power Supply: +15VDC/400mA adapter included (can be powered with 9V-15V power supplies)


• Conditions: For use only in dry environments between 5°C and 40°C.