The 180FCD compression driver is a very high-performance, high-frequency device ideal for professional loudspeaker systems, such as larger 2-way systems.  Diaphragm Assembly The driver sports a 44mm polyimide diaphragm formed as a single piece with the suspension. The voice coil is attached to the dome with our state of the art adhesives and precise bonding equipment. The acoustic output exits through a circumferential phase plug and a 1.0-inch throat aperture. Nominal sensitivity is 109.5 dB 1watt / 1 meter.    REDCATT uses state of the art adhesives in all assembly steps. Our voice coil to dome bonding is a unique process, developed to greatly improve the power handling capabilities. REDCATT unique and precise adhesives dispensing, combined with our in-house developed dome treatments are further improving the long term reliability of this product.