PYLE-PRO PDB752 - 3" Titanium Horn Driver 8 Ohm 4-Bolt 3'' (76.2mm) Flat Aluminum Voice Coil - Titanium Diaphragm - 400 Watts RMS / 800 Watts Peak 50 oz. Magnet Structure - 8 Ohm Impedance For Directivity Horns With Four M6 Threaded Holes 90 Around on a 4'' Diameter Circle Frequency Response: 1kHz~20kHz Sensitivity (1w/1m): 107dB SPL