Nominal Basket Diameter 18" 458mm
Nominal Impedance 8 ohm
Nominal Power Handing (AES) 700W
Continuous Power Handing 1400W
Resonance 30HZ
Usable Frequency Range 30HZ-1200HZ
Sensitivity 96 dB
Magnet Weight 125 oz
Voice coil (TIL) 4" 100mm
THIELE&SMALL PARAMETERS 
Resonant Frequency fs 30HZ
DC Resistance Re 5.2 ohm
Mechanical Q Qms 8.1
Electromagnetic Q Qes 0.4
Total Q Qts 0.38
Compliance Equivalent Volume VAS 168 Ltr
Mechanical Compliance of Suspension (Cms) 160um/N
BL Product BL 17.6 T-M
Diaphragm Mass Inc.Airload Mms 138 grams
MOUNTING INFORMATION 
Overall Diameter 458mm
Baffle Hole Diameter 420mm
Mounting Holes Diameter 6.5mm
Mounting Holes P.C.D 438mm
Depth 207mm
Net Weight 11.4 kg
Shipping Weight 13.1 kg
Packing Size: 475x475x495mm (2PCS)
20”/500pcs  40”/1040pcs  40”H/1220pcs