What is a 7 band Equalizer?

Answer 1

A 7 band equaliser is a device that has 7 separate frequency range sliders, were the frequency is centered on the frequency stated below the slider. When a note is played it is made up of a series of frequencies, the fundamental being the one you hear and then a series of harmonics or overtones. A slider will then increase or decrease the 'intensity' of the overtones within its frequency range, depending on the position of the slider. Most sliders can increase or decrease the intensity of a certain overtone by up to 12 or 15dB. The use is to make a note or music played sound of higher or bassier sound, if you have one push the sliders on the left up and you get a real 'thuddy' bass sound and the ones on the right give you a real 'tinny' high pitched sound. A typical guitar EQ will have sliders centered on say 100, 200, 400, 800, 1600, 3200 and 6400Hz. The reason for the larger gap between the frequency sliders as the frequency increases is due to the ears response to sound, (The ear can distinguish between different frequencies better at low frequencies).