Nominal Basket Diameter 18"  460mm
Nominal Impedance 8 ohm
Nominal Power Handling(AES) 1200W
Continuous Power Handling 2400W
Resonance 37HZ
Usable Frequency Range 37HZ-1.2KHZ
Sensitivity 98 dB
Magnet Weight NEODYMUIM
Voice coil (TIL) 4" 99.2mm
THIELE&SMALL PARAMETERS 
Resonant Frequency fs 37HZ
DC Resistance Re 5.6 ohm
Mechanical Q Qms 7.94
Electromagnetic Q Qes 0.2
Total Q Qts 0.19
Compliance Equivalent Volume VAS 147.58 Ltr
Mechanical Compliance of Suspension (Cms)  72.9uM/N
BL Product BL 41T-M
Diaphragm Mass Lnc.Airload Mms 248 grams
MOUNTING INFORMATION 
Overall Diameter 460mm
Baffle Hole Diameter 423mm
Mounting Holes Diameter 7mm
Mounting Holes P.C.D 440mm
Depth 206mm
Net Weight 6.3kg
Shipping Weight 7.8kg
Packing Size: 485x485x485mm (2PCS)
20”/490pcs  40”/1020pcs  40”H/1190pcs