PD Calculator Tech Note: Volume 1, #28 Tech Note: Volume 1, #29 Tech Note: Volume 1, #30 Tech Note: Volume 1, #31 Tech Note: Volume 1, #32 WRC & WRX Configurations Installed Sound 8100 Series : AE : AE Compact : CBT Series : Control 1 Pro  : Control 200  : Control 2P : Control 300 : Control 40 : Control 5 : Control Contractor : Control Contractor 50 Series Sub/Sat. : Control CRV : Custom Shop : PD5000 Series : PD700 : VERTEC : VLA  : VP : VRX   One of the challenges in large arenas, stadiums, houses of worship and performance spaces is to provide quality sound to every seat with the volume and clarity demanded by today's concert, sporting and special events. JBL Professional's new Precision Directivity™ (PD) line of speakers uses a full range, full bandwidth total system approach that allows contractors and consultants to design a fully integrated sound system that solves the audio challenges inherent to these types of large installations. Frequency Range Frequency Response Coverage Angle PD743 Very High Output Mid-High Loudspeaker System 150 Hz - 17 kHz (-10 dB) 200 Hz – 15 kHz (+/- 3 dB) 40° x 30° Frequency Range Frequency Response Coverage Angle PD764 Very High Output Mid-High Loudspeaker System 150 Hz - 17 kHz (-10 dB) 200 Hz – 15 kHz (+/- 3 dB) 60° x 40°