SB21RDCN-C000-4 / Fabric

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
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Additional information

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

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

Note

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

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