Patent ID: 8170233

Claim:
A loudspeaker, comprising: one center driver mounted at approximately an intersection of an x-axis and a y-axis of the loudspeaker; at least two drivers of a size different than the center driver mounted symmetrically along the loudspeaker in both the x-axis and y-axis about the center driver; the center driver and the at least two drivers mounted symmetrically about the center driver each receiving a digital input signal filtered through at least one digital FIR filter and converted to analog by at least one power D/A converter; and the at least two drivers each positioned at a distance relative to the intersection that is determined by adjusting an initial distance position of the drivers based upon application of a cost minimization function, where the cost function is minimized at frequency points within a frequency range based upon initial directivity target functions that define performance requirements at the frequency points and where the cost minimization function defines amplitude frequency responses normalized to a line perpendicular to a plane formed by the x-axis and the y-axis.