Product informationhome>>FR421


    • Features
    • 1. 90W continuous program power capacity

      2. 87dB sensitivity,1w/1m

      3. 20mm(0.8") high temperature copper cald aluminum voice coil

      4. Vented voice coil former increases airflow to provide enhanced cooling

      5. Shorting copper ring for extended HF response

      6. Strong and light fiberglass cone remains rigid to higher frequencies

      7. Ideal for compact array systems

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 Le1K 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(1pc)
Shipping Weight 14 kg(24pcs)
Shipping Box 430*430*225 mm