Number of Channels
4 independent inputs
Professional audio, microphones and system integration

The Harmonai CX400 is a professional 4-channel passive mixer, designed for scenarios requiring the mixing of multiple audio signals into a single output. Built with a passive circuit architecture, it operates stably without external power—effectively eliminating ground loop noise and power supply interference. Its compact form factor makes it an ideal audio signal processing tool for stage performances, recording studios, conference systems, and live sound reinforcement.
4 independent inputs
Passive mixer
Passive design—no external power required
CX400
Harmonai
The CX400 is widely used across professional audio environments: in stage performances, it mixes multiple microphone or instrument signals; in recording studios, it consolidates multi-channel audio feeds; in conference systems, it unifies outputs from multiple speaking units; and in live sound reinforcement, it serves as a portable signal mixing node. Its passive design ensures clean, reliable audio mixing in diverse electromagnetic environments.
Contact our professional team for technical specifications or pricing information on the Harmonai CX400 4-Channel Passive Mixer.