SPCEIFICATINONS   
Nomin diameter :           300mm. 12in
Nomin al impe dance:    8 ohm
Power rating:                300W RM S                                   
Sensitivity (1w/1m) :     99dB±3dB
Frequency range:          55-3kHz
Voice Coil diameter :      φ75.5mm
Voice coil length:           18mm
Air gap height:               10mm
 

THIELE & SMALL PARAMETERS
Resonace frequency,FS:                55Hz
D.C.Resistan ce,Re:                       6.0 ohm
Mechanical quality factor,Qms:      5.43
Electrical quality factor,Qes:          0.28
Total quality factor,Qts:                 0.27
Equivalent air volme to Cms,Vas:  46L
Mechanical compliance,Cms:          0.13mm/N
Bl factor,Bl:                                    22.66N/A
Effective surface area,Sd：            0.053㎡

MATERIALS
Basket:                     Aluminium
Cone and dust can : Paper
Surround:                 Treated cloth
Voice coil wire:         Copper
Voice coil bobbin:      Glass Fibre
Magnet:                    NdFeB  

MOUNTING INFORMATION
Overall diameter:         φ312mm
Bolt circle diameter:     φ295mm
Baffle cutout diameter:φ280mm
Depth:                         143mm
Net weight:                 4.39kg