PYLE-PRO PDS344 - 1.35" Titanium Horn Driver 8 Ohm 1-3/8 x 18 TPI 200 Watts RMS / 400 Watts Peak Power Handling - 25 oz. Magnet Structure Midrange / Tweeter Compression Driver - 1.35'' (34.4mm) Flat Aluminum Voice Coil - Titanium Diaphram Sensitivity (1w/1m): 103dB SPL - Frequency Response: 800Hz ~ 20kHz Fits Horns with 1 3/8" x 18 TPI Threads 8 Ohm Impedance