SB29BAC-C000-4 / Beryllium


  • Beryllium dome for non-resonant high frequency extension
  • Large surround dome for increased acoustic output
  • Copper cap for reduced voice coil inductance and minimum phase shift
  • Saturation controlled motor system for low distortion
  • Dual balanced compression chambers for improved dynamics
  • Flow optimized vented pole piece for optimum coupling to rear chamber
  • Non-reflective rear chamber with optimized damping for improved dynamics
  • CCAW voice coil for low moving mass
  • Long life flexible lead wires
  • Cast aluminium faceplate
  • Low resonance frequency
Categories: ,

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 g

Free air resonance

Fs 650 Hz


(2.83V/1m) 93 dB

Mechanical Q-factor

Qms 2.71

Electrical Q-factor

Qes 1.22

Total Q-factor

Qts 0.84

Force factor

Bl 2.4 Tm

Rated power handling

*80 W

Magnetic flux density

1.1 T

Magnet weight

0.22 kg

Net Weight

0.5 kg


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

SB29BAC-C000-4 Datasheet