- 1.75-inch diaphragm 1.0-inch exit throat titanium compression driver - 100 watt continuous program power handling - frequency range: 1000hz - 20khz - 2-slot optimized geometry phase plug - aluminum rear cover - copper inductance ring for extended response - vented suspension system the n450 features 1.75-inch diaphragm w/a 1.0 inch exit throat. The diaphragm is precision formed from .05 mm thick pure titanium. The suspension is based on a vented mylar design.the n450 is a versatile driver for pro. Applications. Compact 2-way systems multiple-way medium throw systems. Flexible & easy to crossover offer precision & definition combined to a very good power handling for the size. Very good in combination w/rcf h100 hf101 horns.