Processor
U.S.-made DSP digital processing chip
Professional audio, microphones and system integration

The Harmonai FBX220 automatic feedback suppressor features a U.S.-made DSP digital processing chip and advanced digital signal processing technology, specifically engineered to eliminate acoustic feedback (howling) caused by microphone use. The unit enters anti-howling mode automatically at power-on — no complex setup required. Its plug-and-play operation makes professional audio processing simple and intuitive.
It includes 68 fully automatic scanning notch filters. Channels 1 and 2 share one DSP processor, with intelligent allocation of filtering resources. After each notch filter activates to suppress howling, the EQ points automatically restore balance within 2 seconds, ensuring natural, smooth sound reproduction.
U.S.-made DSP digital processing chip
68 fully automatic scanning notch filters
Dual-input/dual-output, with independent volume control per channel
XLR (male) + 6.35mm (1/4") multi-function jack
XLR (female) + 6.35mm (1/4")
Automatic activation at power-on
Automatic dynamic filtering for howling suppression without compromising audio quality
Automatic EQ balance restoration within 2 seconds after notch activation
Automatic peak limiting at threshold to prevent signal overload and distortion
Per-channel rotary level indicator (green = normal / yellow = caution / red = clipping) + frequency indicator
The FBX220 is widely used in conference rooms, multi-function entertainment venues, small-to-medium live events, KTV rooms, and home theaters. Whether for professional performances or everyday use, it effortlessly eliminates microphone feedback — delivering clean, howling-free audio.
Explore more Harmonai professional audio products, or contact us for detailed FBX220 technical specifications and bulk procurement options.