The BMS 4510ND Planar wave driver radiates a coherent planar wave front form a rectangular piston without internal diffraction for superior dispertion control & high fidelity sound. This distinctive new transducer was engineered to work with 4-inch (4" x 1") rectangular throat waveguides providing extremely high sensitivity. The 4510ND is optimised for 10° vertical dispertion & allows a horizontal coverage from 60° to 120° depending on the waveguide used. The unique design of the 4510ND planar wave driver allows perfect acoustical coupling of individual units to create virtually continuous line source. The driver contains a high energy neodymium magnet system & a unique annular ring diaphragm. The ring diaphragm works similar as a wound 140 mm long ribbon diaphragm providing linear frequency response up tp 20 k Hz. The unique planar wave phase plug provide a coherent planar wave front without internal diffraction. Technische Daten Unique Planar Wave Design (patent pending) Neodymium Magnet Assembly Perfect acoustical coupling of individual units to create virtually continuous line source 112 d B sensitivity 1 W / 1 m 1 k Hz Crossover Extended high frequency response up to 20 k Hz Â