SPCEIFICATINONS   
Nomin diameter :           380mm. 15in
Nomin al impe dance:    8 ohm
Power rating:                500W RM S                                   
Sensitivity (1w/1m) :     98dB±3dB
Frequency range:          36-3.5kHz
Voice Coil diameter :      φ99mm
Voice coil length:           20mm
Air gap height:               12mm
magnet dimension :       220mm*25mm 

THIELE & SMALL PARAMETERS
Resonace frequency,FS:                36Hz
D.C.Resistan ce,Re:                       5ohm
Mechanical quality factor,Qms:      6.44
Electrical quality factor,Qes:          0.27
Total quality factor,Qts:                 0.25
Equivalent air volme to Cms,Vas:  159L
Mechanical compliance,Cms:          0.15mm/N
Bl factor,Bl:                                    24.5N/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:      Glass Fibre
Magnet:                    Ferrite 

MOUNTING INFORMATION
Overall diameter:         φ388mm
Bolt circle diameter:     φ370mm
Baffle cutout diameter:φ358mm
Depth:                         160mm
Net weight:                 12kg