• Nominal Diameter 18", 460 mm
• Overall Diameter 18.11", 460 mm
• Bolt Circle Diameter 17.32", 440 mm
• Baffle Cutout Diameter 16.57", 421 mm
• Depth 7.93", 201.5 mm
• Flange and Gasket Thickness 0.54", 13.7 mm

• Minimum Impedance 6.3 Ohm
• Nominal Impedance 8 Ohm
• Nominal Power Handling*** 600 W
• Maximum Power Handling**** 1,200 W
• Sensitivity (1W/1m) 98 dB
• Frequency Range 30 - 3150 Hz
• Voice Coil Diameter 3", 77 mm
• Winding Material Copper
• Former Material Glass Fiber
• Winding Depth 0.87", 22 mm
• Magnetic Gap Depth 0.41", 10.5 mm
• Flux Density 1.2 T

• Resonant Frequency (fs) 30 Hz
• DC Resistance (Re) 5.1 Ohm
• BL Product (BL) 19.5 N/A
• Diaphragm Mass inc. Airload (Mms) 134.3 grams
• Mechanical Compliance of Suspension (Cms) 0.21 mm/N
• Rms 2.91 Kg/s
• Electromagnetic Q (Qes) 0.34
• Mechanical Q (Qms) 8.68
• Total Q (Qts) 0.33
• Compliance Equivalent Volume (Vas) 14.27 ft³, 404.2 dm³
• Surface Area of Cone (Sd) 18017"², 1166 cm²
• Maximum Linear Excursion (Xmax)* 9.25 mm
• Xdamage** 17.5 mm
• Coil Inductance (Le) 1.35 mH
• Diaphragm mass (Mmd) 112.6 g
• Eta Zero 3.1 %

Notes

• *Xmax = [(winding depth - magnetic gap depth) / 2] + (magnetic gap depth / 3)
• **Maximum excursion before permanent damage
• ***2 Hours Test According to AES 2-1984 Rev. 2003
• ****Maximum power is defined as 3dB greater than nominal power