Bose SM20 Black Wired 450 W100 H x 20 V, 59 Hz 18 kHz, 94 dB, 8 , black 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
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