ND9812

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  • ND9812
ND9812

ND9812

1. 1000 W continuous program power capacity
2. Sensitivity: 98dB 1w/1m
3. 59 ~ 3600Hz frequency response range
4. 76mm(3") high temperature copper clad aluminum voice coil wounded on fiberglass former
5. The advanced motor structure is built with an aluminum heat radiator, it also
6. acts as demodulating ring. The structure allows an extreme heat dispersion
7. and a very low distortion figure
8. High temperature SH grade neodymium magnet
9. Optimized for the use in high quality bass reflex systems
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Technical Specifications
  • General Specifications

  • Nominal Diameter

    59.5 Hz

  • Rated Impedance

    8 ohm

  • Nominal Power handling1

    500 Watts

  • Program Power2

    1000 Watts

  • Sensitivity(lw/lm)3

    98 dB

  • Frequency Range4

    59~3600 Hz

  • Minimum Impedance(Zmin)

    6.3 ohm

  • Voice Coil Diameter

    76/3 mm/inch

  • Voice Coil Material

    CCAW

  • Former Material

    Glass Fiber

  • Voice Coil Winding Depth

    18.7 mm

  • Number of layers

    2(inside/outside)

  • Magnet gap depth

    10 mm

  • Basket

    Cast Aluminum

  • Flux Density

    1.2 T

  • Magnet Outer Diameter/Wgt

    Neodymium
  • Thiele-Small parameters

  • Resonance frequency

    Fs 59.5 Hz

  • DC resistance

    Re 5.4 ohm

  • Mechanical factor

    Qms 19

  • Electrical factor

    Qes 0.44

  • Total factor

    Qts 0.43

  • Mechanical compliance

    Cms 0.12 mm/N

  • Mechanical resistance of suspension losses

    Rms 1.2 kg/s

  • Effective Moving Mass

    Mms 61 g

  • Half-space efficiency

    Eff 2.3 %

  • BL Factor

    BL 16.7 T.m

  • Equivalent Cas air load

    Vas 50 liters

  • Effective piston area

    Sd 0.0552 m^2

  • Max. linear excursion6

    Xmax ±6.9 mm

  • Voice coil inductance

    Le1K 0.72 mH

  • Efficiency Bandwidth Product

    EBP 135
  • Mounting Information

  • Overall Diameter

    316 mm

  • Bolt Circle Diameter

    297 mm

  • Bolt Hole Diameter

    6.5 mm

  • Baffle Cutout Diameter

    283 mm

  • Overall Depth

    145 mm

  • Net Weight

    5.4 kg

  • Shipping Weight

    6.1 kg

  • Shipping Box

    345x345x180 mm
Technical Specifications
  • LF General Specifications

  • Nominal Diameter

    mm/inch

  • Rated Impedance

    ohm

  • Nominal Power handling1

    Watts

  • Program Power2

    Watts

  • 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/ND9812-CURVES.jpg

Computer predicted low frequency response

images/upfile/ND9812-PREDICTED.jpg

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