Bose Professional Show Match™ 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 and DSP to provide full-range response from 59 – 18,000 Hz with peak array output of up to 145 dB.