Tweeter SB-Acoustics Satori TW29BN-B Beryllium Speaker

Features
Beryllium dome for non-resonant high frequency extension
Two part aluminium faceplate with integrated mechanical decoupling
Dual balanced compression chambers for improved dynamics
Dual copper caps for absolute minimum voice coil inductance and minimum phase shift
High saturation neodymium motor system with T-shaped pole piece for lower distortion
Non-reflective cast aluminium chamber with optimized damping for improved dynamics
Shallow flow optimized magnet structure for optimum coupling to rear chamber
CCAW voice coil for low moving mass
Long life silver lead wires
Low resonance frequency for extended range

Specs
Nominal Impedance 4 Ω
DC resistance, Re 3.0 Ω
Voice coil inductance, Le 0.02 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 700 Hz
Sensitivity (2.83 V / 1 m) 95 dB
Mechanical Q-factor, Qms 2.1
Electrical Q-factor, Qes 0.60
Total Q-factor, Qts 0.46
Force factor, Bl 3.1 Tm
Rated power handling* 80 W
Magnetic flux density 1.5 T
Magnet weight 0.11 kg
Net weight 0.41 kg
* IEC 268-5, high-pass Butterworth, 2600 Hz, 12 dB/oct.