SB-Acoustics SB29RDC-C000-4  Ring Dome tweeter

This tweeter features a proprietary fabric ring dome with a large roll surround. The center of the dome is stabilized by an internal anchor, much like the Scan Speak domes, but without the external phase plug.  This greatly reduces distortion and brings the acoustic center of the tweeter back to the voice coil, with the added benefit of increased sensitivity. The tweeter has a chambered back designed to provide a lower resonance frequency and reduce back wave reflections from the dome. A copper cap is used on the pole piece. Large surface area.

100 mm flange diameter
70 mm cut out hole size(notch for terminals)
3 mm flange thickness
34.14 mm depth

Impedance 4 ohm
DC resistance 3.0 ohm
V.C. inductance 0.05 mH
Effective cone area 9.6 cm2
V.C. diameter 29 mm
VC height 2.0
Air gap 2.5
Linear excursion ±0.5 mm
Moving mass incl. air 0.45 g
Free air resonance Fs 600 Hz
Sensitivity 2.83V/1M 93 dB
Qms 2.2
Qes 0.9
Qts 0.65
Force factor BL Product - Tm
Power 100 W
Magnet flux density 1.1 T
Magnet weight 0.22 kg