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 18000 Hz with peak array output of up to 145 dB.