Nominal Basket Diameter 12" 300mm
Nominal Impedance 8 ohm
Nominal Power Handing (AES) 450W
Continuous Power Handing 900W
Resonance 42HZ
Usable Frequency Range 42HZ-2KHZ
Sensitivity 96 dB
Magnet Weight 67 oz
Voice coil (TIL) 3" 75.5mm
THIELE&SMALL PARAMETERS 
Resonant Frequency fs 42HZ
DC Resistance Re 4.8 ohm
Mechanical Q Qms 6.2
Electromagnetic Q Qes 0.27
Total Q Qts 0.26
Compliance Equivalent Volume VAS 102.5 Ltr
Mechanical Compliance of Suspension (Cms) 0.26mm/N
BL Product BL 16.7  T-M
Diaphragm Mass Inc.Airload Mms 55 grams
MOUNTING INFORMATION 
Overall Diameter 320mm
Baffle Hole Diameter 282mm
Mounting Holes Diameter 7mm
Mounting Holes P.C.D 302mm
Depth 138mm
Net Weight 7.1kg
Shipping Weight 8.1 kg
Packing Size: 680x345x355mm (4PCS)
20”/1340pcs  40”/2780pcs  40”H/3260pcs