Radial Engineering Highline Passive Line Isolator – Transformer-Isolated Audio Interface for Noise-Free Line-Level Signal Conversion and Ground Loop Elimination

The Radial Engineering Highline Passive Line Isolator is a professional transformer-isolated audio interface designed to eliminate noise, hum, and ground loop issues when connecting line-level devices such as amp modelers, pedalboards, and audio interfaces to mixers, PA systems, or recording equipment.

At its core, the Highline uses a premium Jensen isolation transformer to convert and pass line-level audio while maintaining full signal integrity. This provides complete electrical isolation between connected devices, preventing ground loops and unwanted interference that commonly occur in complex live and studio setups.

Designed as a mono line isolator, the Highline is especially useful for modern guitar rigs using digital amp modelers or multi-effects processors. It ensures that the output signal remains clean and balanced when sent to front-of-house systems, monitors, or recording inputs, preserving tone clarity and dynamic response.

Because it is a fully passive device, the Highline requires no external power and delivers transparent audio performance with minimal coloration. Its transformer-based design ensures stable operation even in electrically noisy environments, making it reliable for both touring and fixed installations.

Key Features:

• Passive mono line isolator for professional audio systems
• Premium Jensen transformer for high-quality signal isolation
• Eliminates ground loops, hum, and electrical noise
• Designed for amp modelers, pedalboards, and line-level devices
• Converts and isolates line-level signals for FOH, monitors, or recording
• Fully passive design (no power required)
• Transparent signal path with minimal coloration
• Ideal for live sound, studio, and touring applications