N.C. Madsensvej 1 6920 Videbæk Denmark Phone: +45 6040 5200 www.scan-speak.dk
TWEETER
D2905/930000
The Classic tweeters are among the many highly praised designs in Classic series. They
have enjoyed success over 3 decades. And still among the best tweeters available. The
D2905/9000 tweeter kick-started a new era with a line of very high quality 1"
tweeters, today known as -9300, -9500, -9700 and -9800. Despite their many years
on the marked still used in many top High-End speakers around the world.
KEY FEATURES:
1" Textile Dome Diaphragm
Low Resonance Rear Chamber
Ferro Fluid
Black Painted Alu Face Plate
Notes:
IEC specs. refer to IEC 60268-5 third edition.
All Scan-Speak products are RoHS compliant.
Data are subject to change without notice.
Datasheet updated: February 22, 2011.
T-S Parameters
Resonance frequency [fs]
650 Hz
Mechanical Q factor [Qms]
0.94
Electrical Q factor [Qes]
0.72
Total Q factor [Qts]
0.41
Force factor [Bl]
3.5 Tm
Mechanical resistance [Rms]
1.96 kg/s
Moving mass [Mms]
0.45 g
Suspension compliance [Cms]
0.13 mm/N
Effective diaph. diameter [D]
33 mm
Effective piston area [Sd]
8.5 cm²
Equivalent volume [Vas]
0.01 l
Sensitivity (2.83V/1m)
90 dB
Ratio Bl/√Re
1.61 N/√W
Ratio fs/Qts
1598 Hz
Electrical Data
Nominal impedance [Zn]
6 Ω
Minimum impedance [Zmin]
5.4 Ω
Maximum impedance [Zo]
10.9 Ω
DC resistance [Re]
4.7 Ω
Voice coil inductance [Le]
0.07 mH
Power Handling
100h RMS noise test (IEC 17.1)*
150 W
Long-term max power (IEC 17.3)*
- W
*Filter: 2. order HP Butterworth, 2.5 kHz
Voice Coil and Magnet Data
Voice coil diameter
28 mm
Voice coil height
3.3 mm
Voice coil layers
2
Height of gap
2.5 mm
Linear excursion
± 0.4 mm
Max mech. excursion
± 1.5 mm
Unit weight
0.7 kg