Pyle PDS772 2.84-Inch Titanium Horn Driver 8 Ohm 13/8-Inch x 18 TPI 300 Watts RMS / 600 Watts Peak Power Handling - 50 oz. Magnet Structure Midrange / Tweeter Compression Driver - 2.84'' (72.2mm) Flat Aluminum Voice Coil - Titanium Diaphram Sensitivity (1w/1m): 107dB SPL - Frequency Response: 500Hz ~ 18kHz Fits Horns with 1 3/8" x 18 TPI Threads 8 Ohm Impedance Midrange/Tweeter Compression Horn Driver Titanium Diaphragm, 2 Flat Aluminum Voice Coil 60 oz. Magnet Structure 300 Watts RMS/600 Watts Peak Power Sensitivity: 107dB @ 1W/1M