It is well known that the inherent linear and nonlinear distortion characteristics of conventional multiway studio transducers can only partly be corrected by digital filter techniques because of the fact that the acoustic output is distributed over the area of interest in a more or less nonuniform way. In this investigation, two different approaches to overcome this problem are presented and compared. First, it is shown that local equalization of a distributed mode panel loudspeaker around the center of excitation, using the early part of the impulse response, yields a very good result over a wide area. The second approach employs a wide-band waveguide design, where the acoustic output of the compression driver is equalized, and nonlinear distortion is corrected by a cost-efficient implementation of a Volterra filter.:
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