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SB Acoustics

SB Acoustics SB21SDC-C000-4 21mm Textile Dome Tweeters

SB Acoustics SB21SDC-C000-4 21mm Textile Dome Tweeters

Regular price Rs. 3,800.00
Regular price Sale price Rs. 3,800.00
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  • Large surround dome for increased acoustic output
  • Dual balanced compression chamber for improved dynamics
  • Copper cap for reduced voice coil inductance and minimum phase shift
  • Saturation controlled motor system for low distortion
  • Non-reflective rear chamber with optimized damping for improved dynamics
  • Flow optimized vented pole piece for optimum coupling to rear chamber
  • CCAW voice coil for low moving mass
  • Long life silver lead wires
  • Low resonance frequency


  • Nominal Impedance 4 Ω
  • DC resistance, Re 3.1 Ω
  • Voice coil inductance, Le 0.04 mH
  • Effective piston area, Sd 4.9 cm2
  • Voice coil diameter 20.4 mm
  • Voice coil height 1.5 mm
  • Air gap height 2.5 mm
  • Linear coil travel (p-p) 1.0 mm
  • Moving mass incl. air, Mms 0.25 g
  • Free air resonance, Fs 720 Hz
  • Sensitivity (2.83 V / 1 m) 91 dB
  • Mechanical Q-factor, Qms 2.41
  • Electrical Q-factor, Qes 1.55
  • Total Q-factor, Qts 0.95
  • Force factor, Bl 1.5 Tm
  • Rated power handling* 40 W
  • Magnetic flux density 1.02 T
  • Magnet weight 0.13 kg
  • Net weight 0.33 kg

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

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