J6721nd

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  • J6721nd
J6721nd

J6721nd

1.4600watts continuous program power capacity

2.96.5db sensitivity 1w/1m

3.36Hz-700Hz frequency response range 

4.7'' high tempreture inside/outside copper voice coil

5.Ventilated voice coil for reduced power compression

6.FEA optimized neodymium magnet assembly allows a very high force factor and a light motor system

7.Ventilated top plate for improved heat dissipation

8.Double silicone Conex spider with optimized compliance

9.Long excursion suspension with linear behavior for large signal

10.BL/Re maximized for loaded applications


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Technical Specifications
  • General Specifications
  • Nominal Diameter

    35 Hz
  • Rated Impedance

    4 ohm
  • Nominal Power handling1

    2300 Watts
  • Program Power2

    4600 Watts
  • Sensitivity(lw/lm)3

    96.5 dB
  • Frequency Range4

    35-700 Hz
  • Minimum Impedance(Zmin)

    5.0 ohm
  • Voice Coil Diameter

    178/7 mm/inch
  • Voice Coil Material

    copper
  • Former Material

    Glassfiber
  • Voice Coil Winding Depth

    33 mm
  • Number of layers

    2(inside/outside)
  • Magnet gap depth

    15 mm
  • Basket

    Cast Aluminum Cast Aluminum
  • Flux Density

    1.25 T
  • Magnet Outer Diameter/Wgt

    mm/oz
  • Thiele-Small parameters
  • Resonance frequency

    Fs 35 Hz
  • DC resistance

    Re 3.7 ohm
  • Mechanical factor

    Qms 17.2
  • Electrical factor

    Qes 0.27
  • Total factor

    Qts 0.26
  • Mechanical compliance

    Cms 0.037 mm/N
  • Mechanical resistance of suspension losses

    Rms 7.27 mech-ohm
  • Effective Moving Mass

    Mms 569 m
  • Half-space efficiency

    Eff 2.3 %
  • BL Factor

    BL 41.6 T.m
  • Equivalent Cas air load

    Vas 149 liters
  • Effective piston area

    Sd 0.1698 m^2
  • Max. linear excursion6

    Xmax 12.8 mm
  • Voice coil inductance

    Le1K 2.0 mH
  • Efficiency Bandwidth Product

    EBP 130
  • Mounting Information
  • Overall Diameter

    545 mm
  • Bolt Circle Diameter

    520 mm
  • Bolt Hole Diameter

    8.5 mm
  • Baffle Cutout Diameter

    495 mm
  • Overall Depth

    247 mm
  • Net Weight

    18.5 kg
  • Shipping Weight

    26.5 kg
  • Shipping Box

    31.4 mm
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

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

images/upfile/J6721nd-curves.jpg

Impedance magnitude curve measured in free air

Computer predicted low frequency response

images/upfile/J6721nd-PREDICTED.jpg
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