Ultra-Compact 9-Band Graphic Equalizer with FBQ             Product Features                 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    Ultra-low noise audio operational amplifiers offer outstanding sound performance    All Mini Series models can be stacked on top of each other to create an ultra-compact signal processor solution    3-Year Warranty Program*    Designed and engineered in Germany         Why do I need an equalizer?   If we all lived in a perfect world, there would be no need for audio equalization. Sound systems would be perfect and would reproduce perfect signals in all their glorious perfection. Also, everyone in that perfect world would like the same amount of bass, midrange and high frequency, and there would be no such thing as feedback. But the world isn’t perfect, is it? Even the best sound system can benefit from the use of a good EQ—like the FBQ800.                   How Does it Work?   Imagine the frequency range of the sound you hear as a highway, a very wide one with nine lanes. Each of these “lanes” represents a single octave of the sonic spectrum. The first four lanes, labeled 63 - 500 (Hz) contain the really low frequency sound content, mainly bass, bass vocals, and the kick and tom drums. The three lanes labeled 1 k, 2 k and 4 k (Hz), make up the fundamental zone of most musical instruments and the male and female vocals. 8 k and 16 k cover the frequency range of cymbals, snare drums and higher pitched percussion instruments. The FBQ800 allows you to control the flow of audio traffic in each of these nine lanes. When properly applied, EQ makes it possible to hear all of these frequency ranges equally, thus the term equalization.               Feedback Elimination   When a specific frequency, or range of frequencies, reaches too high a level, feedback occurs—that all-too-familiar squeal or howl you get when the mic is too close to the speaker. Basically, feedback happens when there is so much of a particular frequency that it is picked up by the mic and run through the system again. That’s why feedback typically gets louder and louder the longer it’s allowed to occur. Needless to say, this kind of feedback is very undesirable. This is where the FBQ800’s Feedback Detection System really works its magic. In this ingenious circuitry, LEDs on the individual faders light up when that frequency band is approaching the danger zone.