SB29BNC-C000-4 / Beryllium


  • Beryllium dome for non-resonant high frequency extension
  • Copper cap on pole piece for reduced voice coil inductance and minimum phase shift
  • CCAW voice coil for low moving mass
  • Internal pressure equalization and flow resistor for non-resonant coupling of cavities
  • Long life flexible lead wires
  • Inherently shielded neodymium motor system
  • Compact design
  • Low resonance frequency
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Additional information

Nominal Impedance

4 Ω

DC resistance

Re 3.0 Ω

Voice coil inductance

Le 0.05 mH

Effective piston area

Sd 9.6 cm2

Voice coil diameter

29.0 mm

Voice coil height

2.0 mm

Air gap height

2.5 mm

Linear coil travel (p-p)

0.5 mm

Moving mass incl. air

Mms 0.46

Free air resonance

Fs 950 Hz


(2.83V/1m) 95 dB

Mechanical Q-factor

Qms 1.36

Electrical Q-factor

Qes 1.40

Total Q-factor

Qts 0.69

Force factor

Bl 2.6 Tm

Rated power handling

*80 W

Magnetic flux density

1.2 T

Magnet weight

31 g

Net Weight

0.17 kg


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

SB29BNC-C000-4 Datasheet