SB Acoustics SB29 BAC-C000-4 Beryllium Tweeter

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SB Acoustics SB29 BAC-C000-4 Beryllium Tweeter

Read test Troels Gravesen, please here!

  • 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
  • Sensitivity (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 g
  • Net weight 0.5 kg
* IEC 268-5, high-pass Butterworth, 2600 Hz, 12 dB/oct

Short data

Usage as Tweeter
Power Handling 80 Watt
Impedance 4 Ohm
Frequency from 1500 Hz
Max. Frequency 30 kHz


Overall dimensions Ø104 mm
Baffle cutout Ø70 mm
Depth (Total) 40.23 mm
Front material Aluminium
Membrane Type Dome
Membrane Material Beryllium
Voice coil Ø 29 mm
Voice coil height 2 mm
Magnet Ø 70 mm


Resonance fs fs: 650 Hz
Mechanical Q Qms: 2.71
Electrical Q Qes: 1.22
Total Q Qts: 0.84
DC-Resistance Re: 3.0 Ohm
Coil Inductance Le: 0.05 mH
Moving Mass Mms: 0.46 g
BL Product Bl: 2.4 N/A
Membrane Area Sd: 9.6 cm²
Sound pressure dB: 93 SPL

Frequency and Impedance

Technical Drawing

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