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SB21RDCN-C000-4 / Fabric

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Features

  • Non-resonant diaphragm design for minimum high frequency break-up
  • Copper cap for reduced voice coil inductance and minimum phase shift
  • Compact low distortion neodymium motor system
  • Non-resonant rear chamber with optimized damping for improved dynamics
  • CCAW voice coil for low moving mass
  • Long life silver lead wires
  • Low resonance frequency

Specs

  • Nominal Impedance 4 Ω
  • DC resistance, Re 3.1 Ω
  • Voice coil inductance, Le 0.04 mH
  • Effective piston area, Sd 4.6 cm2
  • Voice coil diameter 20.4 mm
  • Voice coil height 1.5 mm
  • Air gap height 2.0 mm
  • Linear coil travel (p-p) 0.5 mm
  • Moving mass incl. air, Mms 0.25 g
  • Free air resonance, Fs 850 Hz
  • Sensitivity (2.83V/1m) 89.5 dB
  • Mechanical Q-factor, Qms 2.71
  • Electrical Q-factor, Qes 2.45
  • Total Q-factor, Qts 1.28
  • Force factor, Bl 1.3 Tm
  • Rated power handling* 40 W
  • Magnetic flux density 0.9 T
  • Magnet weight 0.01 kg
  • Net weight 0.06 kg

* IEC 268-5, high-pass Butterworth, 2600 Hz, 12 dB/oct.