The dBDefinition:
1. A deciBel is a logarithmic ratio between two quantities, and is a nonlinear measurement that mimics human perception. 2. A unit expressing sound levels relative to a nominal level just audible by the average human ear, and equal to 1/10th of a Bel. Technologies OPERA series combines exceptional power and a unique acoustic design in order to deliver a vigorous yet pristine sound, successfully adaptable to both playback and live music applications.