SPCEIFICATINONS   
Nomin diameter :           254mm. 10in
Nomin al impe dance:    8 ohm
Power rating:                250W RMS                                   
Sensitivity (1w/1m) :     96dB±3dB
Frequency range:          58-4KHz
Voice Coil diameter :      φ65.5mm
Voice coil length:           16mm
Air gap height:               10mm
magnet dimension :       φ156mm*20mm

THIELE & SMALL PARAMETERS
Resonace frequency,FS:                58Hz
D.C.Resistan ce,Re:                       6 ohm
Mechanical quality factor,Qms:      2.81
Electrical quality factor,Qes:          0.41
Total quality factor,Qts:                 0.36
Equivalent air volme to Cms,Vas:  21L
Mechanical compliance,Cms:          0.12mm/N
Bl factor,Bl:                                    16.47N/A
Effective surface area,Sd：            0.349㎡

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:         φ260mm
Bolt circle diameter:     φ265mm
Baffle cutout diameter:φ236mm
Depth:                         119mm
Net weight:                 5.7kg