The JBL 2385A Bi-Radial. horn is designed for flush cabinet mounting or compact cluster applications.The 2385A has a nominal 60° horizontal x 40° vertical pattern. The horn provides uniform on and off axis frequency response from 500 Hz to beyond 16 kHz in the horizontal plane and 2 kHz to 16 kHz in the vertical plane with constant directivity above 2 kHz. The horn. s small vertical mouth dimension (just slightly larger than the compression driver used to drive the horn) allows very compact single and multiple horn/driver systems to be put together Should vertical pattern control be required below 2 kHz, two or more horns maybe stacked vertically to restore full Bi-Radial.performance.