Designed for professional live sound, studio, and installation environments, the Highline allows engineers to cleanly interface audio equipment while preserving signal integrity. Whether connecting mixers, audio interfaces, powered speakers, or outboard gear across different power systems, the Highline ensures your signal stays quiet, clean, and reliable. At the core of the Highline is a premium isolation transformer that separates the electrical grounds between connected devices while allowing the audio signal to pass through transparently. This transformer-based design helps eliminate ground loop noise, RF interference, and other unwanted artifacts that can occur when linking equipment in complex audio setups. Because it is fully passive, the Highline requires no power and introduces no latency or active circuitry into the signal path. Built to Radial’s renowned standards for durability and reliability, the Highline features a rugged steel enclosure designed to withstand the demands of touring, broadcast, and installation environments. Its straightforward XLR connectivity makes it easy to integrate into virtually any balanced audio signal chain. For engineers who need a dependable way to eliminate noise and maintain professional audio quality, the Radial Highline Passive Line Isolator is a simple and effective solution.

• Eliminates hum and buzz caused by ground loops in balanced audio systems
• High-quality isolation transformer preserves signal integrity
• Balanced XLR input and output for professional audio equipment
• Passive design requires no external power
• Transparent analog signal path with no latency
• Helps prevent noise when connecting equipment on different power systems
• Compact design integrates easily into stage or studio setups
• Ideal for live sound, broadcast, studio, and installation environments
• Rugged steel construction for long-term durability
• Built to Radial’s professional audio standards

• Radial Highline Passive Line Isolator
• Quick Start Guide
• Manufacturer Warranty