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FR421

General Specifications
Nominal Diameter 100/4 mm/inch
Rated Impedance 8 ohm
Nominal Power handling1 45 Watts
Program Power2 90 Watts
Sensitivity(lw/lm)3 87 dB
Frequency Range4 91 ~ 17k Hz
Minimum Impedance(Zmin) 7.2 ohm
Voice Coil Diameter 20/0.8 mm/inch
Voice Coil Material CCAW
Former Material Glass Fiber
Voice Coil Winding Depth 6 mm
Number of layers 2
Magnet gap depth 4 mm
Basket Pressed Steel
Flux Density 1.2 T
Magnet Material 70/8 mm/oz
Thiele-Small parameters
Resonance frequency Hz
DC resistance Re 6.4 ohm
Mechanical factor Qms 4
Electrical factor Qes 1.1
Total factor Qts 0.88
Mechanical compliance Cms 0.65 mm/N
Mechanical resistance
of suspension losses
Rms 0.66 mech-ohm
Effective Moving Mass Mms 4.5 gr
Half-space efficiency Eff 0.18 %
BL Factor BL 3.9 T.m
Equivalent Cas air load Vas 2.5 liters
Effective piston area Sd 0.0053 m2
Max.linear excursion5 Xmax 2 mm
Voice coilinductance LelK 0.3 mH
Efficiency Bandwidth Product EBP 83
Mounting Information
Overall Diameter 127 mm
Bolt Circle Diameter 115 mm
Bolt Hole Diameter 5 mm
Baffle Cutout Diameter 103 mm
Overall Depth 55 mm
Net Weight 0.5 kg
Shipping Weight 14 kg(24pcs)
Shipping Box 430*430*225 mm