Behringer FBQ800 MINIFBQ 9 Band Graphic Equalizer 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-digit LED Input/Output meters and Level control for precise level indication High-quality illuminated faders, potentiometer and illuminated switches for long-term reliability