FAITAL PRO HF104-8 1-inch 8-Ohms HF Driver Bolt On Professional Audio Speaker Applications Wide Frequency Range 40-Watt Rms 80-Watts Max || The FAITAL PRO HF104-8 is a high-frequency driver. It's designed for professional audio applications, offering high sensitivity and a wide frequency range || NOMINAL SPECIFICATIONS || Throat Diameter : 25.4 mm (1 in) || Overall Diameter : 91 mm (3.58 in) || 180° Mounting Holes Diameter (2xM5) : 76 mm (2.99 in) || Depth : 51 mm (2.01 in) || Net Weight : 670 g (1.5 lb) || Shipping Box (Single carton box) : 98 x 90 x 64 mm (3.9 x 3.5 x 2.5 in) || Shipping Weight : 700 g (1.5 lb) || || TECHNICAL PARAMETERS || Nominal Impedance : 8 Ohm || Minimum Impedance : 6.9 Ohm || AES Power Handling (1) : 40 W || Maximum Power Handling (2) : 80 W || Minimum Crossover Frequency (3) : 1.7 kHz || Sensitivity (1W/1m) (4) : 108 dB || Frequency Range : 1.5÷20 kHz || Voice Coil Diameter : 37 mm (1.46 in) || Winding Material : Al || Former Material : Kapton || Diaphragm Material : Ketone Polymer || Diaphragm Shape : Annular || Winding Depth : 2.1 mm (0.08 in) || Magnetic Gap Depth : 2.6 mm (0.10 in) || Flux Density : 1.85 T || Magnet : Neodymium Ring || Re : 5.5 Ohm || Phase Plug Design : Radial || Exit Angle (5) : Combined Exit || NET Air Volume filled by HF Driver : 0.16 dm^3 (0.006 ft^3) || || Brand : FAITAL PRO || Model Number : HF104-8 | HF104 || UPC : 810130951468 || PART NUMBER (P/N) Faston Terminals - 8 Ohm Version : 00373990 || NOTES || Driver mounted on a 1"" 50° x 40° Horn || (1) 2 Hours Test According to AES 2-1984 Rev. 2003 || (2) Maximum power is defined as 3dB greater than nominal power || (3) 12 dB/oct or higher slope high-pass filter || (4) Averaged within the frequency range || (5) The driver's exit coincides with the end of the phase plug, there is no adaptation throat.