Refers to a measure of the sharpness of the resonant peak of an electronic circuit. One of the adjustments available in parametric equalizers. With a narrow Q, gain or cut affects fewer frequencies adjoining the center frequency, while a wide Q will affect a greater number of adjoining frequencies. Expressed as a ratio, a higher Q factor indicates a narrower bandwidth, while a lower number indicates a wider response. Thus, assuming a constant center frequency, Q is inversely proportional to bandwidth.
(See Parametric Equalizer)