Y-DJ Compression Horn Driver Tweeter Speaker 100w 3.5" with Titanium Diaphragm Mounts to 1-3/8"-18 TPI Horn Excellent upper midrange to upper treble tweeter driver Materials: Titanium Diaphragm, 15 Oz. Y35 Magnet, 1-3/8" Voice Coil 100 Watts Peak Power / 50 Watts RMS Power, 8 ohms, 1.5KHz to 20KHz Frequency Response, 104dB Sensitivity Mounts to any 1-3/8"-18 TPI horn Diameter: 4 inch, Depth: 2.5 inch including threaded nose