SPCEIFICATINONS   
Nomin diameter :           308mm. 15in
Nomin al impe dance:    8 ohm
Power rating:                600W RMS                                   
Sensitivity (1w/1m) :     98dB±3dB
Frequency range:          35-3.5KHz
Voice Coil diameter :      φ99.3mm
Voice coil length:           22mm
Air gap height:               12mm

THIELE & SMALL PARAMETERS
Resonace frequency,FS:                35Hz
D.C.Resistan ce,Re:                       6.2 ohm
Mechanical quality factor,Qms:      3.9
Electrical quality factor,Qes:          0.23
Total quality factor,Qts:                 0.23
Equivalent air volme to Cms,Vas:  157L
Mechanical compliance,Cms:          0.08mm/N
Bl factor,Bl:                                    25.32N/A
Effective surface area,Sd：            0.09㎡

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:         φ398mm
Bolt circle diameter:     φ375mm
Baffle cutout diameter:φ358mm
Depth:                         217mm
Net weight:                 7kg