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18_01_12_273_8ndl51rear18_01_12_19_file
Continuous power handling
Voice coil diameter
Magnet material
 
 
 
 

Features

  • 51 mm (2 in) copper voice coil
  • 65 - 3000 Hz response
  • 94 dB sensitivity
  • Neodymium magnet allows a very light yet powerful motor assembly
  • Shorting copper cap for extended HF response
  • 400 W continuous program power capacity
  • Ventilated voice coil gap for reduced power compression

Specifications

  • Nominal Diameter200 mm (8.0 in)
  • Nominal Impedance8 Ω
  • Minimum Impedance6.6 Ω
  • Nominal Power Handling1200 W
  • Continuous power handling2400 W
  • Sensitivity (1W/1m)394.0 dB
  • Frequency Range65 - 3000 Hz
  • Voice Coil Diameter51 mm (2.0 in)
  • Winding MaterialCopper
  • Former MaterialGlass Fibre
  • Winding Depth17.0 mm (0.65 in)
  • Magnetic Gap Depth8.0 mm (0.31 in)
  • Flux Density1.05 T

Design

  • Surround ShapeDouble Roll
  • Cone ShapeExponential
  • Magnet MaterialNeodymium Inside Slug
  • SpiderSingle
  • Pole DesignStraight Pole
  • Woofer Cone TreatmentTWP Waterproof Both Sides
  • Recommended Enclosure14.0 dm3 (0.49 ft3)
  • Recommended Tuning65 Hz

Parameters4

  • Resonance Frequency66 Hz
  • Re5.3 Ω
  • Qes0.41
  • Qms3.6
  • Qts0.37
  • Vas14.0 dm3 (0.5 ft3)
  • Sd220.0 cm2 (34.1 in2)
  • η₀1.0 %
  • Xmax± 7.0 mm
  • Xvar± 7.0 mm
  • Mms28.0 g
  • Bl12.4 Txm
  • Le0.5 mH
  • EBP160 Hz

Mounting and Shipping Info

  • Overall Diameter225 mm (8.8 in)
  • Bolt Circle Diameter210 mm (8.3 in)
  • Baffle Cutout Diameter187.0 mm (7.4 in)
  • Depth90 mm (3.5 in)
  • Flange and Gasket Thickness11 mm (0.4 in)
  • Air Volume Occupied by Driver1.1 dm3 (0.04 ft3)
  • Net Weight1.85 kg (4.08 lb)
  • Shipping Units1
  • Shipping Weight2.3 kg (5.07 lb)
  • Shipping Box255x255x150 mm (10.04x10.04x5.91 in)

Service Kit

  • 2 hours test made with continuous pink noise signal within the range Fs-10Fs. Power calculated on rated minumum impedance. Loudspeaker in free air.
  • Power on Continuous Program is defined as 3 dB greater than the Nominal rating.
  • Applied RMS Voltage is set to 2.83 V for 8 ohms Nominal Impedance.
  • Thiele-Small parameters are measured after a high level 20 Hz sine wave preconditioning test.