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6nsm51rear_etc6nsm51front
Continuous Power Handling
Voice Coil Diameter
Magnet Material
For simplified cabinet assembly and efficient thermal transfer to the air, our NSM series of sealed back midranges feature a cast aluminum sealed chassis, high strength neodymium motor, and large internal volume for good low frequency performance. Large voice coils provide power handling, while careful selection of suspension and cone components results in exceptional sensitivity. These dedicated narrow-bandwidth midranges offer the lowest distortion at given output of any midrange available. 
 
 
 

Features

  • 500 W continuous program power capacity
  • 51 mm (2 in) aluminium voice coil
  • 300 - 6000 Hz response
  • 100 dB sensitivity
  • Ideal for Direct Radiation and Horn Loaded Midrange application
  • Extremely Low Distortion Figure

Specifications

  • Nominal Diameter170 mm (6.5 in)
  • Nominal Impedance8 Ω
  • Minimum Impedance6.6 Ω
  • Nominal Power Handling1250 W
  • Continuous Power Handling2500 W
  • Sensitivity3100.0 dB
  • Frequency Range300 - 6000 Hz
  • Voice Coil Diameter51 mm (2.0 in)
  • Winding MaterialAluminium
  • Former MaterialGlass Fibre
  • Winding Depth8.5 mm (0.33 in)
  • Magnetic Gap Depth6.0 mm (0.24 in)
  • Flux Density1.6 T

design

  • Surround ShapeTriple Roll
  • Cone ShapeRadial
  • Magnet MaterialNeodymium Ring
  • SpiderSingle
  • Pole DesignT-Pole
  • Woofer Cone TreatmentWP Waterproof Front Side

Parameters4

  • Resonance Frequency280 Hz
  • Re5.4 Ω
  • Qes0.68
  • Qms5.4
  • Qts0.6
  • Vas0.7 dm3 (0.02 ft3)
  • Sd143.0 cm2 (22.17 in2)
  • η₀2.2 %
  • Xmax2.8 mm
  • Maximum Excursion3.0 mm
  • Mms13.5 g
  • Bl13.9 Txm
  • Le0.15 mH
  • EBP411 Hz

Mounting and Shipping Info

  • Overall Diameter187 mm (7.36 in)
  • Bolt Circle Diameter172 mm (6.77 in)
  • Baffle Cutout Diameter151.0 mm (5.94 in)
  • Depth113 mm (4.45 in)
  • Flange and Gasket Thickness11 mm (0.43 in)
  • Air Volume Occupied by Driver2.0 dm3 (0.07 ft3)
  • Net Weight2.7 kg (5.95 lb)
  • Shipping Units1
  • Shipping Weight2.95 kg (6.5 lb)
  • Shipping Box221x214x130 mm (8.70x8.43x5.12 in)

Service Kit

  • RCK06NSM518
  • 2 hours test made with continuous pink noise signal within the range Fs-10Fs. Power calculated on rated nominal 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.
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