Dome Tweeter SB-Acoustics SB29BAC-C000-4 Beryllium Speaker

Features
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

Specs
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