SPCEIFICATINONS   
Nomin diameter :           254mm. 10in
Nomin al impe dance:    4 ohm
Power rating:                120W RM S                                   
Sensitivity (1w/1m) :     93dB±3dB
Frequency range:          58-3KHz
Voice Coil diameter :      φ49.5mm
Voice coil length:           12mm
Air gap height:               6mm
magnet dimension :       φ135mm*20mm

THIELE & SMALL PARAMETERS
Resonace frequency,FS:                58Hz
D.C.Resistan ce,Re:                       3.2 ohm
Mechanical quality factor,Qms:      3.40
Electrical quality factor,Qes:          0.75
Total quality factor,Qts:                 0.41
Equivalent air volme to Cms,Vas:  23L
Mechanical compliance,Cms:          \
Mechanical resistance,Rms:          \
Bl factor,Bl:                                    8.7N/A
Effective surface area,Sd：            0.034㎡

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

MOUNTING INFORMATION
Overall diameter:         φ256mm
Bolt circle diameter:     φ230mm
Baffle cutout diameter:φ236mm
Depth:                         115mm
Net weight:                 3kg