Nominal Basket Diameter 18" 460mm
Nominal Impedance 8 ohm
Nominal Power Handing (AES) 1000W
Continuous Power Handing 2000W
Resonance 35HZ
Usable Frequency Range 35HZ-1KHZ
Sensitivity 97 dB
Magnet Weight 126 oz
Voice coil (TIL) 4" 99.2mm
THIELE&SMALL PARAMETERS 
Resonant Frequency fs 35HZ
DC Resistance Re 5 ohm
Mechanical Q Qms 8.9
Electromagnetic Q Qes 0.31
Total Q Qts 0.3
Compliance Equivalent Volume VAS 225.1 Ltr
Mechanical Compliance of Suspension (Cms) 0.11mm/N
BL Product BL 24.2  T-M
Diaphragm Mass Inc.Airload Mms 175 grams
MOUNTING INFORMATION 
Overall Diameter 460mm
Baffle Hole Diameter 416mm
Mounting Holes Diameter 7mm
Mounting Holes P.C.D 438mm
Depth 209mm
Net Weight 12.1 kg
Shipping Weight 14.1 kg