Expression Pedal Isolator | Clean Expression Control for Organs & Synths
The Harrison Laboratories Expression Pedal Isolator is a specialized passive component designed to eliminate noise and ground loops in complex performance rigs. If you are routing a single expression pedal to multiple devices—such as a classic organ console and a modern digital effects processor—this isolator ensures a clean, hum-free signal.
By isolating the control voltage, this unit prevents electrical conflicts between gear while maintaining the full integrity of your pedal’s resistance sweep. It is the essential "clean-up" tool for Allen Organs, custom synthesizer rigs, and professional pedalboards where crosstalk and ground hum are not an option.
Product Features
• Total Signal Isolation: Eliminates ground loops and hum when sharing one pedal across two devices.
• Passive Performance: No external power required; uses high-quality internal components for zero signal degradation.
• Dual-Control Routing: Safely split expression signals between original organ hardware and external effects units.
• Professional Durability: Housed in a compact, rugged metal enclosure built for studio and stage use.
Technical Specifications
• Circuitry: Fully passive signal isolation
• Compatibility: Designed for Allen Organs, synthesizers, and MIDI/analog expression chains
• Input Tolerance: Handles control voltages up to 20 Volts RMS
• Connector Options: Available in RCA or 1/4" TRS configurations
• Enclosure: Compact, gold-plated or black metal housing
• Origin: Made in the USA 🇺🇸
