Nominal Basket Diameter  12", 304.8mm
Impedance 8 ohms
Power Rating 500Wrms
Resonance 37Hz
Usable Frequency Range 35Hz - 2.5kHz
Sensitivity click here for guide
Magnet Weight 80oz.
Gap Height  0.375", 9.52mm
Voice Coil Diameter    3.0", 76.2mm

Mounting Information 
Recommended Enclosure Volume  17 - 23 liters
     (vented)  0.6 - 0.8 cu. ft.
Overall Diameter     12.38", 314.3mm
Baffle Hole Diameter   11.06", 281mm
Front Sealing Gasket fitted as standard
Rear Sealing Gasket  fitted as standard
Mounting Holes Diameter  0.275", 7mm
Mounting Holes B.C.D.  11.57", 293.8mm
Depth 6.22", 158mm
Shipping Weight         18.8lbs., 8.6 kg.

Thiele-Small Parameters
Resonant Frequency (fs) 37Hz
Impedance (Re)    5.46 ohms
Coil Inductance (Le) 1.22mH
Electromagnetic Q (Qes) 0.25
Mechanical Q (Qms) 6.93
Total Q (Qts) 0.24
Compliance Equivalent Volume (Vas) 121 liters
4.27 cu. ft.
Peak Diaphragm Displacement Volume (Vd) 247cc
Mechanical Compliance of Suspension (Cms) 0.32mm/N
BL Product (BL) 17.3 T-M
Diaphragm Mass inc. Airload (Mms) 59 grams
Equiv. Resistance of Mechanical 
          Suspension Loss (Rms) 1.97N*sec/M
Efficiency Bandwidth Product (EBP) 148
Voice Coil Overhang (Xmax) 4.8mm
Surface Area of Cone (Sd) 519.5cm2
Impedance at Resonance (Zmax) 158 ohms
Maximum Mechanical Limit (Xmech) 29.59mm