Screw-on Tweeter Driver with 40 Oz. Magnet 300 Watts RMS / 600 Watts Peak Power Handling - 40 oz. Magnet Structure Midrange / Tweeter Compression Driver - 2.02'' (51.2mm) 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, 2.02 (51.2mm) Flat Aluminum Voice Coil 40 oz Magnet Structure 300 Watts RMS/600 Watts Peak Sensitivity: 107dB @ 1W/1M