BEHRINGER MINIFBQ FBQ800 Ultra-compact 9.5" graphic equalizer for studio and stage applications Revolutionary FBQ Feedback Detection system instantly reveals critical frequencies and can also be used as Audio Analyzer Additional Low-cut filter removes unwanted frequencies, e. g. floor rumble Accurate 6-segment LED input/output meters and Level control for precise level indication High-quality illuminated faders, potentiometers and illuminated switches for long-term reliability