2 Inch Cloth Diaphragm - 30 oz. Magnet.2 Inch High-Temperature Voice Coil - 8 Ohm Impedance.500 Watts Max..Frequency Response: 400 Hz - 9000 Hz.SPL: 102dB (1W/1M) This high power tweeter compression horn will get you higher than high! With a 2 Inches high-temperature voice coil, 30 oz. magnet, and 500 watts maximum power, you’ll get the crispest, most accurate highs possible with modern speaker technology. 8 ohm impedance.