FR421

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FR421

FR421

1. 90W continuous program power capacity
2. 87dB sensitivity, 1w/1m
3. 20mm(0.8") high temperature copper clad aluminum voice coil
4. Vented voice coil former increases airflow to provide enhanced cooling
5. Shorting copper ring for extended HF response
6. Y35  Barium ferrite magnet
7. Strong and light fiberglass cone remains rigid to higher frequencies
8. Ideal for mini array systems, full range application.
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Technical Specifications
  • General Specifications

  • Nominal Diameter

    92 Hz

  • 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 Outer Diameter/Wgt

    70/8 mm/oz
  • Thiele-Small parameters

  • Resonance frequency

    Fs 92 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 g

  • 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 m^2

  • Max. linear excursion6

    Xmax 2 mm

  • Voice coil inductance

    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/pc

  • Shipping Weight

    14 kg/24pcs

  • Shipping Box

    430x430x225 mm(24pcs)
Technical Specifications
  • LF General Specifications

  • Nominal Diameter

    mm/inch

  • Rated Impedance

    ohm

  • Nominal Power handling1

    Watts

  • Program Power2

  • Sensitivity(lw/lm)3

  • Frequency Range4

    Hz

  • Voice Coil Diameter

    mm/inch

  • Voice Coil Material

    Copper

  • Voice Coil Winding Depth

    mm

  • Number of layers

    (inside/outside)

  • Magnet Outer Diameter/Wgt

    mm/oz
  • HF General Specifications

  • Throat Diameter

    mm/inch

  • Rated Impedance

    ohm

  • Power handling(2k~18kHz)

        Nominal2

    Watts

  •     Continuous Porgram3

    Watts

  • Sensitivity3(lw/lm,on axis)

    dB

  • Frequency Range4

    Hz

  • Voice Coil Diameter

    mm/inch

  • Voice Coil Material

    Copper

  • Diaphragm Material

    mm

  • Magnet Material

    kg
  • LF Thiele-small Parameters

  • Resonance frequency

    Fs Hz

  • DC resistance

    Re ohm

  • Mechanical factor

    Qms

  • Electrical factor

    Qes

  • Total factor

    Qts

  • Mechanical compliance

    Cms mm/N

  • Mechanical resistance of suspension losses

    Rms mech-ohm

  • Effective Moving Mass

    Mms g

  • Half-space efficiency

    Eff %

  • BL Factor

    BL T.m

  • Equivalent Cas air load

    Vas liters

  • Effective piston area

    Sd ㎡

  • Max. linear excursion5

    Xmax mm

  • Voice coil inductance

    Le1K mH

  • Efficiency Bandwidth Product

    EBP mH
  • Mounting Information

  • Overall Diameter

    mm

  • Bolt Circle Diameter

    mm

  • Bolt Hole Diameter

    mm

  • Baffle Cutout Diameter

    mm

  • Overall Depth

    mm

  • Net Weight

    kg

  • Shipping Weight

    kg

  • Shipping Box

    mm
Technical Specifications
  • General Specifications

  • Throat Diameter

    mm/inch

  • Rated Impedance

    ohm

  • Power handling

        Nominal2

    Watts

  •     Continuous Porgram3

    Watts

  • Sensitivity4(1w/1m,on axis,on horn)

    dB

  • Frequency Range

    Hz

  • Minimum Impedance(Zmin)

    ohm

  • Voice Coil Diameter

    mm/inch

  • Voice Coil Material

  • Voice Coil Former

  • Phase Plug Material

  • Diaphragm Material

  • Flux Density

    T

  • Magnet Material

  • Mounting Information

  • Overall Diameter

    mm

  • Overall Depth

    mm

  • Net Weight

    kg

  • mounting

    4xM6 holes,90°on 102
Curves

Frequncy response measured in a closed enclosure of 600L in an anechoic chamber

images/upfile/FR431-Curves.jpg

Computer predicted low frequency response

images/upfile/FR421-PREDICTED.jpg

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