The GE601 Graphic Equalizer covers six carefully selected frequency bands (100 Hz, 200 Hz, 400 Hz, 800 Hz, 1.6 KHz, and 3.2 KHz) over a five octave range with 12 dB of cut/boost per band. The GE601 also offers a master output Level control with 12 dB of cut/boost. With careful use of these controls, the GE601 can be used to fine tune your sound in a variety of extremely useful ways.