Nominal Basket Diameter 12" 305mm
Nominal Impedance 8 ohm
Nominal Power Handing (AES) 400W
Continuous Power Handing 800W
Resonance 51HZ
Usable Frequency Range 51HZ-2KHZ
Sensitivity 97 dB
Magnet Weight 89 oz
Voice coil (TIL) 3" 75.5mm
THIELE&SMALL PARAMETERS 
Resonant Frequency fs 51HZ
DC Resistance Re 5.8 ohm
Mechanical Q Qms 9.8
Electromagnetic Q Qes 0.29
Total Q Qts 0.28
Compliance Equivalent Volume VAS 63.15 Ltr
Mechanical Compliance of Suspension (Cms) 0.16mm/N
BL Product BL 19.8  T-M
Diaphragm Mass Inc.Airload Mms 60 grams
MOUNTING INFORMATION 
Overall Diameter 320mm
Baffle Hole Diameter 286mm
Mounting Holes Diameter 8mm
Mounting Holes P.C.D 300mm
Depth 150mm
Net Weight 8.3 kg
Shipping Weight 9.3 kg
Packing Size: 680x345x375mm (4PCS)
20”/1280pcs  40”/2640pcs  40”H/3100pcs