Nominal Basker Diameter 21"  535mm
Nominal Impedance 8 ohm
Nominal Power Handling(AES) 1000W
Continuous Power Handling 2000W
Resonance 34HZ
Usable Frequency Range 40HZ-2.5KHZ
Sensitivity 95 dB
Magnet Weight 240 oz
Voice coil (TIL) 5" 125mm
THIELE&SMALL PARAMETERS 
Resonant Frequency                   fs 34HZ
DC Resistance                        Re 5.3ohm
Mechanical Q                         Qms 6.8
Electromagnetic Q                    Qes 0.43
Total Q                              Qts 0.37
Compliance Equivalent Volume VAS 180 Ltr
Mechanical Compliance of Suspension Cms 68 uM/N
BL Product                           BL 37.1T-M
Diaphragm Mass Lnc.Airload           Mms 370.2 grams
MOUNTING INFORMATION 
Overall Diameter            545mm
Baffle Hole Diameter     495mm
Mounting Holes Diameter    7mm
Mounting Holes P.C.D     520mm
Depth      221mm
Net Weight 22.5kg
Shipping Weight 25.5kg