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Continuous Power Handling
Voice Coil Diameter
Magnet Material
When used with the Powersoft IPAL power amp modules, the 21PAL can provide extreme output in a very small, dependable package.
For more information, visit the Powersoft Website.
 
 
 
 

Key Features

  • 5000 W continuous program power capacity
  • 153 mm (6 in) split winding aluminium voice coil
  • 37 - 1000 Hz response
  • 99 dB sensitivity
  • Neodymium magnet allows a very high force factor and linear excursion
  • Double silicone spider with optimized compliance
  • 80 mm peak-to-peak excursion before damage
  • Ventilated voice coil gap for reduced power compression

Specifications

  • Nominal Diameter530 mm (21.0 in)
  • Nominal Impedance1 Ω
  • Minimum Impedance1.1 Ω
  • Nominal Power Handling12500 W
  • Continuous Power Handling25000 W
  • Sensitivity399.0 dB
  • Frequency Range37 - 1000 Hz
  • Voice Coil Diameter153 mm (6.0 in)
  • Winding MaterialAluminium
  • Former MaterialGlass Fibre
  • Winding Depth48.0 mm (1.9 in)
  • Magnetic Gap Depth18.0 mm (0.7 in)
  • Flux Density1.35 T

Design

  • Surround ShapeTriple Roll
  • Cone ShapeRadial
  • Magnet MaterialNeodymium Inside Slug
  • SpiderDouble Silicone
  • Pole DesignT-Pole
  • Woofer Cone TreatmentTWP Waterproof Both Sides
  • Recommended Enclosure200.0 dm3 (7.06 ft3)
  • Recommended Tuning40 Hz

Parameters4

  • Resonance Frequency37 Hz
  • Re0.7 Ω
  • Qes0.22
  • Qms4.9
  • Qts0.21
  • Vas155.0 dm3 (5.47 ft3)
  • Sd1680.0 cm2 (260.4 in2)
  • η₀3.2 %
  • Xmax22.0 mm
  • Xvar15.0 mm
  • Mms487.0 g
  • Bl19.1 Txm
  • Le0.5 mH
  • EBP168 Hz

Mounting And Shipping Info

  • Overall Diameter547 mm (21.5 in)
  • Bolt Circle Diameter527 mm (20.7 in)
  • Baffle Cutout Diameter508.0 mm (20.0 in)
  • Depth269 mm (10.59 in)
  • Flange and Gasket Thickness13 mm (0.51 in)
  • Air Volume Occupied by Driver16.0 dm3 (0.56 ft3)
  • Net Weight22.0 kg (48.5 lb)
  • Shipping Units1
  • Shipping Weight24.3 kg (53.57 lb)
  • Shipping Box570x570x320 mm (22.44x22.44x12.60 in)

Service Kit

  • RCK21IPAL
  • 2 hours test made with continuous pink noise signal (6 dB crest factor) within the range Fs-10Fs. Power calculated on rated minimum 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.