Bose ShowMatch SM20 DeltaQ Full-Range Line Array Loudspeaker

Bose Professional ShowMatch™ DeltaQ™ SM20 full-range array modules provide 20° nominal vertical coverage with included field-changeable waveguides offering choice of 70° or 100° horizontal coverage and optional accessory 120° waveguides.  Replace single waveguide panel to form horizontal asymmetrical patterns.   The 2-way module requires external power amplifiers (2- channels) and DSP to provide full-range response from 59 - 17,000 Hz with peak array output of up to 145 dB. Bose Professional ShowMatch™ array loudspeakers - the newest DeltaQ™ technology design - feature replaceable waveguides that allow changing coverage and asymmetrical patterns, in compact enclosures optimized for both installation and portable applications requiring the best possible (top-class) sound quality. Features: DeltaQ™ technology is the next-generation line-array design that allows "Q" (directivity) to vary with each module in the array for more consistent coverage over wide frequency range, reduced array w