SPCEIFICATINONS   
Nomin diameter :           254mm. 10in
Nomin al impe dance:    8 ohm
Power rating:                150W RM S                                   
Sensitivity (1w/1m) :     89dB±3dB
Frequency range:          53-4KHz
Voice Coil diameter :      φ49.5mm
Voice coil length:           15mm
Air gap height:               8mm
magnet dimension :       φ140mm*20mm

THIELE & SMALL PARAMETERS
Resonace frequency,FS:                53Hz
D.C.Resistan ce,Re:                       6 ohm
Mechanical quality factor,Qms:      12.74
Electrical quality factor,Qes:          0.46
Total quality factor,Qts:                 0.44
Equivalent air volme to Cms,Vas:  38L
Mechanical compliance,Cms:          0.23mm/N
Bl factor,Bl:                                    12.7N/A
Effective surface area,Sd：            0.035㎡

MATERIALS
Basket:                     Steel
Cone and dust can : Paper
Surround:                 Foam
Voice coil wire:         Copper
Voice coil bobbin:      Kapton 
Magnet:                    Ferrite 

MOUNTING INFORMATION
Overall diameter:         φ257mm
Bolt circle diameter:     φ247mm
Baffle cutout diameter:φ233mm
Depth:                         188mm
Net weight:                 3.85kg