Product Overview

The Harmonai FBX401 is a professional 4-input, 1-output digital feedback suppressor designed for high-fidelity audio environments including conference systems, theaters, auditoriums, classrooms, and multi-purpose venues. Equipped with an adaptive filter, it supports dual-mode operation—‘Fast’ and ‘Precise’—switchable on demand. The Fast mode is ideal for multi-microphone conference systems where mic positions change frequently; the Precise mode suits stable acoustic environments with fixed microphone placement. Up to 12 dB of additional gain margin is available before acoustic feedback occurs, effectively eliminating howling interference.

The FBX401 features a built-in auto-mixer that automatically reduces gain for weaker microphone signals while boosting stronger ones when multiple mics are active. It intelligently tracks moving speakers and delivers optimal speech clarity—even when feedback suppression is disabled, the auto-mixer remains fully operational.

Typical Applications

The FBX401 is widely deployed in professional venues demanding exceptional audio quality: In multi-mic conference systems with frequent mic switching, the Fast mode adapts flexibly to changing mic positions; in fixed-mic environments like academic lecture halls or churches, the Precise mode—using slower convergence—effectively suppresses more reflected energy; in large spaces such as theaters, auditoriums, and multi-purpose halls, its 12 dB extra gain margin ensures stable sound reinforcement without feedback; and in classroom or training settings, the auto-mixer intelligently tracks mobile presenters to maintain consistent voice clarity.