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18_54_53_836_8nw51_00_sito18_54_54_209_8nw51_01_sito18_54_54_240_8nw51_02_sito
Continuous power handling
Voice coil diameter
Magnet material
 
 
 

Features

  • 400 W continuous program power capacity
  • 51 mm (2 in) copper voice coil
  • 70 - 3000 Hz response
  • 97 dB sensitivity
  • Neodymium ring magnet assembly
  • Shorting copper cap for extended HF response
  • Ventilated voice coil gap for reduced power compression

Specifications

  • Nominal Diameter200 mm (8.0 in)
  • Nominal Impedance4 Ω
  • Minimum Impedance3.7 Ω
  • Nominal Power Handling1200 W
  • Continuous power handling2400 W
  • Sensitivity (1W/1m)397.0 dB
  • Frequency Range70 - 3000 Hz
  • Voice Coil Diameter51 mm (2.0 in)
  • Winding MaterialCopper
  • Former MaterialGlass Fibre
  • Winding Depth16.0 mm (0.65 in)
  • Magnetic Gap Depth10.0 mm (0.4 in)
  • Flux Density1.3 T

Design

  • Surround ShapeDouble Roll
  • Cone ShapeExponential
  • Magnet MaterialNeodymium Ring
  • SpiderSingle
  • Pole DesignT-Pole
  • Woofer Cone TreatmentTWP Waterproof Both Sides

Parameters4

  • Resonance Frequency76 Hz
  • Re2.5 Ω
  • Qes0.26
  • Qms5.3
  • Qts0.25
  • Vas10.6 dm3 (0.37 ft3)
  • Sd220.0 cm2 (34.1 in2)
  • η₀1.76 %
  • Xmax± 6.0 mm
  • Xvar± 5.0 mm
  • Mms27.0 g
  • Bl11.2 Txm
  • Le0.2 mH
  • EBP292 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)
  • Depth100 mm (4.0 in)
  • Flange and Gasket Thickness11 mm (0.4 in)
  • Air Volume Occupied by Driver1.1 dm3 (0.04 ft3)
  • Net Weight3.05 kg (6.72 lb)
  • Shipping Units1
  • Shipping Weight3.5 kg (7.72 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 2V for 4 ohm Nominal Impedance
  • Thiele-Small parameters are measured after a high level 20 Hz sine wave preconditioning test.