
N.C. Madsensvej 1 · 6920 Videbæk · Denmark · Phone: +45 6040 5200 · www.scan-speak.dk
TWEETER D2905/950000
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] 550 Hz
Mechanical Q factor [Qms] 1.04
Electrical Q factor [Qes] 0.60
Total Q factor [Qts] 0.38
Force factor [Bl] 3.5 Tm
Mechanical resistance [Rms] 1.50 kg/s
Moving mass [Mms] 0.45 g
Suspension compliance [Cms] 0.19 mm/N
Effective diaph. diameter [D] 33 mm
Effective piston area [Sd] 8.5 cm²
Equivalent volume [Vas] 0.02 l
Sensitivity (2.83V/1m) 90 dB
Ratio Bl/√Re 1.61 N/√W
Ratio fs/Qts 1452 Hz
Electrical Data
Nominal impedance [Zn] 6 Ω
Minimum impedance [Zmin] 5.5 Ω
Maximum impedance [Zo] 12.9 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