Radial HIGHLINE
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- This item is covered for 3 years
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Manufacturer Information
Radial
https://www.radialeng.com
info@radialeng.com
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Safety manager:
Algam SAS
Email: contact@algam.net
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Essential Information About the Highline Line Isolator
- Direct connection from pedalboard to PA/interface: designed to integrate naturally after an amp modeler, without coloration or level loss.
- Premium Jensen 1:1 transformer: preserves line level and provides galvanic isolation to eliminate ground loop noise.
- Balanced output: ideal for long runs to the PA while preserving signal integrity.
- Phantom power protection: phantom power is blocked so it never reaches your pedalboard.
Designed for Modern Amp Modeler Setups
With the widespread use of amp modelers on pedalboards, many guitarists and bassists have adopted an "all-in-one" setup: preamp, amp, simulated cabinet, effects... then output to the front of house or a recording system. In this context, the constraints are no longer those of a traditional stage amp: you need to ensure a clean, stable, and robust signal capable of passing through a mixing desk and long cables without adding hiss, hum, or unwanted distortion.
The Highline addresses this reality precisely. Where some devices output a line level via unbalanced 6.35mm Jack connections, the slightest grounding or wiring issue can turn into buzzing, interference, or loss of brightness. The Highline serves as a simple and reliable solution to secure the connection between your pedalboard and the PA (or recording), preserving the dynamics and maximum volume of your chain.
Who Benefits from the Highline and in What Applications?
The Highline is aimed at instrumentalists (guitar, bass, and more broadly any source from a pedalboard) who play with an amp modeler and want a "plug-and-play" connection to a PA system or a recording setup. It is especially relevant if you frequently switch between venues, studios, and stages where electrical conditions vary and the risk of ground loops increases.
On stage, it allows you to send a clean signal to the front of house without struggling with hum that appears as soon as you connect your pedalboard to the sound system. In the studio, it facilitates a quieter and more stable direct input, preventing power or grounding issues from contaminating an otherwise careful capture. Finally, if your modeler offers stereo outputs, the Highline provides a convenient option to combine these two channels into a single usable output.
Technical specifications
| Category | Line isolator | Color | Black |
| Number of channels | 1 | Power supply | Passive |
| Frequency response | 20 Hz - 20 kHz | Weight | 0.5 kg |
| Inputs | 2 x jack | Dimensions (mm) | 108 x 70 x 44 |
| Analog outputs | XLR | ||
Questions frequently asked
Does the Radial Highline work with an amp modeler on a pedalboard?
This unit accepts jack outputs from a pedalboard or modeler and delivers a balanced XLR output to a mixing console or recording system. Its Jensen 1:1 transformer maintains line level while providing galvanic isolation.
How to eliminate a ground loop between a pedalboard and a PA system?
Galvanic isolation provided by the Jensen 1:1 transformer breaks ground loops that cause hum and buzz. The connection to the control room is then made via the balanced XLR output.
Can a stereo output from a modeler be summed to mono?
The Sum switch allows two jack inputs to be combined into a single mono output. When this mode is activated, the Thru jack becomes a second input compatible with a 6.35 mm TS or TRS cable. The mix is performed by a passive resistive circuit.
Can phantom power reach the pedalboard?
The XLR output blocks phantom power from the console to prevent it from reaching the pedalboard.
What are the Highline's dimensions and power requirements?
With dimensions of 108 x 70 x 44 mm and a weight of 0.5 kg, this unit easily fits into a mobile setup. It operates completely passively and requires no external power supply.
