Nominal Basket Diameter 18" 460mm
Nominal Impedance 8 ohm
Nominal Power Handing (AES) 900W
Continuous Power Handing 1800W
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 4.8 ohm
Mechanical Q Qms 8.2
Electromagnetic Q Qes 0.33
Total Q Qts 0.32
Compliance Equivalent Volume VAS 245.8 Ltr
Mechanical Compliance of Suspension (Cms) 0.11mm/N
BL Product  BL 24.6  T-M
Diaphragm Mass Inc.Airload Mms 185 grams
MOUNTING INFORMATION 
Overall Diameter 465mm
Baffle Hole Diameter 422mm
Mounting Holes Diameter 7mm
Mounting Holes P.C.D 445mm
Depth 210mm
Net Weight 12.36 kg
Shipping Weight 14.36 kg
Packing Size: 490x490x495mm (2PCS)
20”/470pcs  40”/970pcs  40”H/1140pcs