Product Overview

The Harmonai FBX440 Automatic Feedback Suppressor employs advanced DSP digital processor technology specifically designed to eliminate microphone acoustic feedback (howling). It enters anti-howling mode automatically at power-on—plug-and-play operation with zero learning curve and high-fidelity audio reproduction. Its 4-in/4-out channel architecture features independent volume control and tri-color rotating status LEDs (green = normal / yellow = caution / red = clipping limit) per channel for real-time audio monitoring.

Powered by a U.S.-made DSP chip, the unit runs a digital signal processing system capable of fully automatic scanning across 68 filter points. Channels 1–2 and channels 3–4 each share one dedicated DSP processor allocating 68 filter points. After each notch filter engages to suppress howling, EQ balance automatically restores within 2 seconds, preserving natural sound quality.

It includes automatic limiter activation at critical levels: when input signals become dangerously loud, the unit dynamically reduces gain to prevent distortion or speaker damage. The limiter gradually returns to normal once signal levels stabilize—ensuring uninterrupted operation under typical use.

Recommended Applications

Whether supporting remote video conferencing in a professional conference room or powering the sound system in a multi-function entertainment venue, the FBX440 effectively eliminates microphone howling. In small-to-midsize live performance settings, its stable, reliable anti-howling performance lets performers focus entirely on their craft. In KTV rooms and home theaters, its intuitive plug-and-play design enables every user to enjoy premium audio effortlessly.