Midrange/Tweeter Compression Horn Driver Titanium Diaphragm 1.35'' (34.4mm) Flat Aluminum Voice Coil 12 oz Magnet Structure Frequency Response: 1kHz - 20kHz Sensitivity: 102dB @ 1W/1M 8 Ohm Impedance 200 Watts RMS/400 Watts Peak Terminals 250 Type Fits Horns with 1 3 /8'' x 18 TPI Threads 1.35" Titanium Horn Driver 8 Ohm 1-3/8" x 18 TPI