Frequency-selective feedback for audio systems

THE performance of the majority of sound systems is limited by the frequency response of the loud-speaker. The frequency distortion inherent in all but the most expensive loud-speaker equipment can be compensated by modifying the gain frequency characteristics of the associated amplifiers by the use of feedback. Not only can the relatively poor frequency response of the average louds-peaker be compensated, but it is possible also to modify the response of a system by this method so that the sound can be reproduced naturally at higher or lower intensity levels.