Nominal Basket Diameter 12"  320mm
Nominal Impedance 8 ohm
Nominal Power Handling(AES) 1000W
Continuous Power Handling 2000W
Resonance 52HZ
Usable Frequency Range 52HZ-1.2KHZ
Sensitivity 95.5 dB
Magnet Weight NEODYMUIM
Voice coil (TIL) 4" 99.2mm
THIELE&SMALL PARAMETERS 
Resonant Frequency fs 47HZ
DC Resistance Re 5.6 ohm
Mechanical Q Qms 6.96
Electromagnetic Q Qes 0.19
Total Q Qts 0.18
Compliance Equivalent Volume VAS 31.58 Ltr
Mechanical Compliance of Suspension (Cms)  69.9uM/N
BL Product  BL 40T-M
Diaphragm Mass Lnc.Airload Mms 166 grams
MOUNTING INFORMATION 
Overall Diameter 319mm
Baffle Hole Diameter 281mm
Mounting Holes Diameter 7mm
Mounting Holes P.C.D 300mm
Depth 130mm
Net Weight 5.3kg
Shipping Weight 6.3kg
Packing Size: 675x345x310mm (4PCS)
20”/1560pcs  40”/3220pcs  40”H/3760pcs