• Nominal Diameter 4", 100 mm
• Overall Diameter 5.1/3.9", 128.85/100.5 mm
• Bolt Circle Diameter 4.54", 115.26 mm
• Baffle Cutout Diameter 3.60", 91.5 mm
• Depth 2.30", 58.3 mm
• Flange and Gasket Thickness 0.28", 7.2 mm

• Minimum Impedance 7.2 Ohm
• Nominal Impedance 8 Ohm
• Nominal Power Handling*** 30 W
• Maximum Power Handling**** 60 W
• Sensitivity (1W/1m) 91 dB
• Frequency Range 90 - 20,000 Hz
• Voice Coil Diameter 0.75", 19 mm
• Winding Material Aluminium
• Former Material Kapton
• Winding Depth 0.26", 6.8 mm
• Magnetic Gap Depth 0.16", 4 mm
• Flux Density 1.5 T

• Resonant Frequency (fs) 100 Hz
• DC Resistance (Re) 6.5 Ohm
• BL Product (BL) 4.1 N/A
• Diaphragm Mass inc. Airload (Mms) 3.9 grams
• Mechanical Compliance of Suspension (Cms) 0.6 mm/N
• Rms 0.4 Kg/s
• Electromagnetic Q (Qes) 0.9
• Mechanical Q (Qms) 5.5
• Total Q (Qts) 0.8
• Compliance Equivalent Volume (Vas) 0.12 ft³, 3.4 dm³
• Surface Area of Cone (Sd) 9.86"², 63.62 cm²
• Maximum Linear Excursion (Xmax)* 2.73 mm
• Xdamage** 6.8 mm
• Coil Inductance (Le) 0.25 mH
• Diaphragm mass (Mmd) 3.6 g
• Eta Zero 0.39 %

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