HF FE Compression driver with 120W of continuous program power capacity. There are three different diaphragm materials: Mylar, pure Titanium and Polyimide. Each material has its own unique benefits and qualities. Mylar allows for an exceptionally smooth transient response. Pure Titanium provides superb power handling and excellent reliability in the field. Polyimide achieves very high power handling and sensitivity levels, and creates a smooth top end response. Other features in our compression drivers include copper shorting rings and flat, edge-wound, copper-clad, aluminum voice coil wire.