Loudspeaker Compensation Using Integrated Circuits

The principal axis frequency response of a loudspeaker is compensated using standard synthesis techniques and the desired flat response is obtained. The technique is based on a pole-zero cancellation of the loudspeaker response using integrated circuit operational amplifiers and resistance-capacitance components. Subjective tests with both male and female listeners confirm that the response is greatly improved. It is anticipated that in order to approximate an ideal frequency response for good listening, this type of compensator will be incorporated into the preamplifier.