Ground-plane circular-arc CBT line arrays with wide horizontal coverage offer a very viable, high performance, simple, and thrifty alternative to the usual sound reinforcement setup where loudspeakers are elevated or hung overhead. Due to the broadband constant beamwidth/directivity/coverage characteristics and narrow vertical coverage of the CBT array, the ground-plane version offers a number of strong performance and operational advantages even when they are located on stage behind the performers. Among these are: even coverage, minimal front-back variation in sound level, flat-energy response, less energy directed upwards towards ceiling, improved intelligibility, less prone to feedback, and greater performer freedom to move around on stage. In addition, these arrays minimize the use of stage monitors, require minimal installation voicing and on-site equalization adjustments, and result in a much simpler system, i.e., fewer speakers, fewer power amps, and fewer processing channels.
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