Radial Engineering Highline

Radial Engineering's Highline is a passive mono line isolator designed to connect guitars and amp modelers to PA systems without coloration, noise or distortion. An industry-leading Jensen transformer provides the isolation needed to protect equipment from phantom power while offering linear frequency response from 10Hz to over 70kHz. Highline is built to take on the most demanding tours, with a thick steel casing and extremely rugged components that ensure a high level of reliability.

Notable features

• Compact, pedalboard-friendly design
• No loss of signal strength or timbre when connecting to mixers
• High reliability and Radial build quality
• Jensen transformer with precision windings
• Ability to sum stereo to mono sources

Radial Highline (and Highline Stereo) is a passive line isolator that offers the ultimate solution for musicians who use amp simulators on their pedalboards. Equipped with high-quality Jensen transformers, Highline is a device that provides signal cleanliness and clarity, eliminating hum and noise with superior isolation. It also provides a balanced output for long cable connections without degradation. Highline due to its features and size offers complete integration with other equipment and provides a high level of reliability on stage and in the studio.

Protecting Your Sound

Highline is a line isolator designed specifically to meet the needs of instrumentalists using amplifier simulators, enabling them to connect seamlessly to a PA or recording system while maintaining full signal integrity without additional noise or distortion. Highline features a superior Jensen 1:1 transformer that maintains the full volume level from the pedalboard to the PA, while providing galvanic isolation that eliminates ground loop noise for a clean, noise-free signal. Highline's balanced output allows connection to a PA using very long cables and blocks phantom power so that it never reaches the pedalboard. Finally, Highline can also accept stereo inputs and sum them to mono via the Sum switch.

Designed for Amp Modelers

Guitarists and bassists who use Amp Modelers on their pedalboard may encounter a number of problems. Although amplifiers are capable of producing line-level outputs, they often use unbalanced 1/4 connectors that do not support long runs of cable without degrading the tone of the instrument, and they are also particularly susceptible to noise from ground loops by connecting them directly to the PA. The Highline solves these problems by inserting a 1:1 transformer into the signal path that isolates Setup, reducing noise, protecting it from phantom power, and keeping the signal at line level.

Highline applications

Connect your amp simulator to the PA

Highline allows you to send your guitar amp simulator signal directly to the PA, maintaining signal level and sound quality. The internal transformer provides isolation to reduce noise and protects equipment from accidentally turning on phantom power.

Summing the signal of a stereo amplifier to mono

'Highline can also be configured to accept a stereo signal and sum both channels to the XLR output, so you don't have to reconfigure any presets when PA channel space is limited. Just plug in the summing switch to use the Thru jack as a second input.

Use the Thru for local monitoring

When using a mono source device with Highline, you can connect the Thru output to a stage amplifier for local monitoring, while the XLR output feeds the PA system.