Horizontal dispersion in the A9 Array is 90° at 10KHz, 120° below 5KHz. Vertical dispersion is variable and it can be set from 0° to 80°. Splaying angle between rows can be changed in 2.5° increments, from 0° to 10° total in four fixed increments. For example, we were able to evenly cover 1/4th of the Arco Arena in Sacramento, California with only one MAD Array, i.e. we could cover the entire Arena with only 4 Arrays. Custom design of the Array can achieve any dispersion angle in both horizontal and vertical plane, from 0° to 360°.