SPCEIFICATINONS   
Nomin diameter :           380mm. 15in
Nomin al impe dance:    8 ohm
Power rating:                300W RM S                                   
Sensitivity (1w/1m) :     98dB±3dB
Frequency range:          44-3.5kHz
Voice Coil diameter :      φ75.5mm
Voice coil length:           16mm
Air gap height:               10mm
magnet dimension :       φ170mm*20mm 

THIELE & SMALL PARAMETERS
Resonace frequency,FS:                44Hz
D.C.Resistan ce,Re:                       6ohm
Mechanical quality factor,Qms:      12
Electrical quality factor,Qes:          0.59
Total quality factor,Qts:                 0.56
Equivalent air volme to Cms,Vas:  166L
Mechanical compliance,Cms:          0.16mm/N
Bl factor,Bl:                                    16.3N/A
Effective surface area,Sd：            0.085㎡

MATERIALS
Basket:                     Aluminium
Cone and dust can : Paper
Surround:                 Treated cloth
Voice coil wire:         Copper
Voice coil bobbin:      Kapton
Magnet:                    Ferrite 

MOUNTING INFORMATION
Overall diameter:         φ390mm
Bolt circle diameter:     φ370mm
Baffle cutout diameter:φ356mm
Depth:                         157mm
Net weight:                 8kg