Nominal Basket Diameter 18" 460mm
Nominal Impedance 8 ohm
Nominal Power Handling (AES) 1000W
Continuous Power Handling 2000W
Resonance 33HZ
Usable Frequency Range 33HZ-1.2KHZ
Sensitivity 97 dB
Magnet Weight NEODYMIUM
Voice coil (TIL) 4" 99.2mm
THIELE&SMALL PARAMETERS 
Resonant Frequency fs 33HZ
DC Resistance Re 5.1 ohm
Mechanical Q Qms 9.2
Electromagnetic Q Qes 0.43
Total Q Qts 0.42
Compliance Equivalent Volume VAS 263.58 Ltr
Mechanical Compliance of Suspension (Cms) 122.36um/N
BL Product BL 23  T-M
Diaphragm Mass Inc.Airload Mms 180 grams
MOUNTING INFORMATION 
Overall Diameter 465mm
Baffle Hole Diameter 422mm
Mounting Holes Diameter 7mm
Mounting Holes P.C.D 445mm
Depth 206mm
Net Weight 8.2kg
Shipping Weight 9.7 kg
Packing Size: 490x490x485mm (2PCS)
20”/480pcs  40”/1000pcs  40”H/1170pcs