Nominal Basket Diameter 15" 380mm
Nominal Impedance 8 ohm
Nominal Power Handing (AES) 400W
Continuous Power Handing 800W
Resonance 41HZ
Usable Frequency Range 41HZ-2KHZ
Sensitivity 99 dB
Magnet Weight 77 oz
Voice coil (TIL) 3" 75.5mm
THIELE&SMALL PARAMETERS 
Resonant Frequency fs 41HZ
DC Resistance Re 5.2 ohm
Mechanical Q Qms 6.21
Electromagnetic Q Qes 0.25
Total Q Qts 0.24
Compliance Equivalent Volume VAS 185.3 Ltr
Mechanical Compliance of Suspension (Cms) 0.18mm/N
BL Product BL 21.2  T-M
Diaphragm Mass Inc.Airload Mms 89 grams
MOUNTING INFORMATION 
Overall Diameter 394mm
Baffle Hole Diameter 354mm
Mounting Holes Diameter 7mm
Mounting Holes P.C.D 374mm
Depth 169mm
Net Weight 8 kg
Shipping Weight 9.5 kg
Packing Size: 420x420x420mm (2PCS)
20”/750pcs  40”/1560pcs  40”H/1830pcs