Throat Diameter:1.4in(36mm) 

Mounting Type:Screw on 13/8″ 

Diaphragm Material :Titanium

FrequencyRange:500KHz-18KHz

Voice Coil Material :Copper clad aluminum round wire
Voice Coil Diameter:2.93 in (74.5mm)    

Magnet: Strontium Ferrite
 Sensitivity(1M/1W):106dB  
Nominal Impedance:8 Ohm  

 Flux Density:1.80T  

orter diameter:Ф170mm    
Net Weight:4.8kg  

 PCS/CTN:4PCS  

  Power Capacity:40Watts RMS(pink noise signal-12db/0CT)