Product Type
Single-channel headphone volume controller
Professional audio, microphones and system integration

Harmonai PM1 is a professional-grade passive single-channel headphone volume controller, categorized under amplifiers. Built with a fully passive circuit architecture, it delivers precise and smooth volume control without external power. A premium rotary potentiometer ensures natural, refined adjustments every time, while its robust metal chassis and compact form factor integrate effortlessly into any desktop audio workflow.
Single-channel headphone volume controller
PM1
Passive circuit (no power supply required)
Single independent channel
Harmonai
The PM1 is ideal for studio headphone monitoring, enabling mixing engineers to fine-tune monitor levels with precision; equally suited for home HiFi systems as a pre-volume control before a headphone amplifier; and widely deployed in professional audio studios, personal music production, and any scenario demanding accurate, repeatable volume control for critical listening.
Explore the full range of Harmonai professional audio equipment—contact us to learn more and order today.