RCF N850 Vehicle Speaker 3-inch Diaphragm, 2.0-inch Exit Throat Titanium Compression Driver180 watt Continuous program power handling Frequency range: 500Hz - 20kHz 3-slot, optimized geometry phase plug Aluminum rear cover and front adaptor Copper inductance ring for extended response Vented suspension system The N850 is a compression driver for professional applications, from high power 2-way systems to multiple- way long throw systems and large format arrays.