Bose ShowMatch SM10 DeltaQ Array LoudspeakerBose Professional ShowMatch DeltaQ SM10 full range array modules provide 10 nominal vertical coverage with included field changeable waveguides offering choice of 70 or 100 horizontal coverage. 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 18,000 Hz with peak array output of up to 145 dB.