4. compression driver withpure titanium diaphragm 6.compression driver details: General Specifications3Throat Diameter25.4/1mm/inchRated Impedance8ohmPower bandling(1.5k-18kHz) Nominal2 Continuous Porgram3 40 80 Watts WattsSensitivity4 (lw/lm,on axis,on horn) 106 dBFrequency Range51.2k-20kHzMinimum Impedance(Zmin)7.5ohmVoice Coil Diameter34/1.3mm/inchVoice Coil MaterialCopper Clad AluminumVoice Coil Winding FormerKaptonPhase Plug MaterialCompositeFlux Density1.5TMagnet Material/MassCeramic/0.52kgMounting Information 1.2k-20kOverall Diameter100mmOverall Depth57.5mmNet Weight1.1mm4xM5 holes,90°on 69mm diameter