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Specifications

Model NO: 18AV-9
1> GENERAL SPECIFICATIONS                                                 
*Nominal Diameter : 18inch         
*Rated Impedance : 8 Ω     
*Power Handing Capacity: 400 Watts               
*Sensitivity (1W, 1M): 94 dB           
*Effective Piston Diameter              : 407 mm 
*Voice Coil Diameter : 99. 5            mm /4  inch
2> THIELE-SMALL PARAMETERS                                         
*Resonance Frequency /Fs : 40 Hz
*DC Resistance /Re  : 5. 5 Ω
*Mechanical Q Factor /Qms : 8. 1             
*Electrical Q Factor /Qes: 0. 58 
*Total Q Factor /Qts : 0. 54 
*BL Factor /BL : 23        TM
*Effective Moving Mass /Mms : 223 gr
*Equivalent Cas Air Load /Vas : 163 liters
*Effettive Piston Area /Sd : 0. 13 m2
*Half-Space Efficienc /Eff: 1. 83 %
*Airgap Height /Hag: 10 mm
*Voice coil Heigh /Hvc : 21. 0 mm
*Voice coil Over-Hu /Xmax : 5. 5 mm
3> PHYSICAL INFORMATION                                       
*Basket : Aluminium
*Magnet Type, Size (ODxIDxH(mm)): 220x110x25. 4  Ferrite 125
OZ
*Voice Coil Former : BASV                                 
*Voice Coil Material : EISV                                   
*Cone Material: Pulp Paper         
*Surround : Treated Cloth               
*Spider : Cotton Blend Polyester
*Dust Cap : Pulp Paper