Radial Highline Passive Stereo Line Isolator

About: Radial Highline Passive Stereo Line Isolator

The Radial Highline Stereo is the ultimate line isolator for stereo amp simulators and pedalboards. Equipped with dual Jensen transformers, the Highline Stereo delivers clean, balanced signals with maximum clarity and retains the full output of your gear. Designed with Radial’s rugged build quality, it’s a dependable choice for live or studio use. Dual XLR and Thru outputs handle stereo setups, while XLR Sum and Thru Sum functions provide seamless mono compatibility without compromising your tone.

• No loss of signal strength or tone when connecting to a mixer.
• Radial's renowned reliability and build quality. 
• Precision-wound Jensen Transformer delivers exceptional clarity and warmth.
• Passive, plug-and-play design requires no external power. 

Your True Sound, From Pedal to Performance

Amp simulators are more popular than ever, but they present a unique set of problems for guitar and bass players who want to interface them with a PA system. While amp sims can produce line-level outputs, they often have ¼" unbalanced connectors that aren't designed for long cable runs, and they encounter hum and buzz from ground loops when connected directly to the PA.

The Radial Highline is a line isolator ideal for players who utilize amp simulators on their pedalboard. The Highline features premium Jensen 1:1 transformers that retain the full volume from the amp sim while providing isolation that breaks up ground loops and protects against phantom power, along with a balanced output that can be run over long distances without signal degradation.

Features

• Input
  • Stereo Inputs: Left and right ¼" input jacks to connect to the balanced or unbalanced outputs from amp sims & guitar pedals.
  • Thru: Left and right ¼" outputs to feed a pair of stage amplifiers.
  • XLR Sum: Sums the left and right input channels to mono at both XLR outputs, allowing you to retain your pedalboard settings when there’s only room for a mono input on the mixer.  
  • Thru Sum: Sums the left and right input channels to mono at both Thru outputs, allowing you to feed a stereo signal to the mixer while monitoring locally with a single amplifier.
• Output
  • Stereo Outputs: Stereo XLR outputs provide balanced & isolated signals for feeding the inputs of a mixer.
  • Lift: Ground lift switch eliminates hum and buzz from ground loops.

Specifications

• Audio circuit type: Passive, transformer based
• Transformer: JT-11-YMPC
• Number of channels: Two channel (dual mono)
• Frequency response: 20Hz - 20kHz (±0.05dB)
• Signal to noise ratio: 112dB
• Total harmonic distortion + noise
  • <0.05% from 20Hz - 20kHz @ -10dBV
  • <0.0008% @ 1kHz / -10dBV
• Phase deviation: ±0.3° from 20Hz - 20kHz @ -10dBV
• Construction: 14 gauge steel Outer Shell & 16 gauge Chassis
• Finish: Durable Powder Coat
• Power: Passive, no power required
• Conditions: For use in dry locations only between 5°C and 40°C
• Size (LxWxD): 5” x 3.3” x 1.8” (127mm x 84.1mm x 45.5mm)
• Weight: 1.01lbs (0.496kg)
• Warranty: Radial 3-year, transferable