Scanspeak D2904-950000 User Manual [ru]
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
TWEETER D2904/950000
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 Resonant Rear Chamber
· 4 ohm
T-S Parameters
Resonance frequency [fs] 550 Hz
Mechanical Q factor [Qms] 1.47
Electrical Q factor [Qes] 0.53
Total Q factor [Qts] 0.39
Force factor [Bl] 3.2 Tm
Mechanical resistance [Rms] 1.05 kg/s
Moving mass [Mms] 0.45 g
Suspension compliance [Cms] 0.19 mm/N
Effective diaph. diameter [D] 35 mm
Effective piston area [Sd] 9.5 cm²
Equivalent volume [Vas] 0.02 l
Sensitivity (2.83V/1m) 91 dB
Ratio Bl/√Re 1.71 N/√W
Ratio fs/Qts 1421 Hz
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.
· Ferro Fluid
· Black Paineted Alu Face Plate
Electrical Data
Nominal impedance [Zn] 4 Ω
Minimum impedance [Zmin] 4.3 Ω
Maximum impedance [Zo] 13.3 Ω
DC resistance [Re] 3.5 Ω
Voice coil inductance [Le] 0.05 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 2.5 mm
Voice coil layers 2
Height of gap 2.5 mm
Linear excursion ± 0.1 mm
Max mech. excursion ± 1.5 mm
Unit weight 0.7 kg
N.C. Madsensvej 1 · 6920 Videbæk · Denmark · Phone: +45 6040 5200 · www.scan-speak.dk
TWEETER D2904/950000
Advanced Parameters (Preliminary)
Electrical data:
Resistance [Re'] - Ω
Free inductance [Leb] - mH
Bound inductance [Le] - mH
Semi-inductance [Ke] - SH
Shunt resistance [Rss] - Ω
Mechanical Data
Force Factor [Bl] - Tm
Moving mass [Mms] - g
Compliance [Cms] - mm/N
Mechanical resistance [Rms] - kg/s
Admittance [Ams] - mm/N
N.C. Madsensvej 1 · 6920 Videbæk · Denmark · Phone: +45 6040 5200 · www.scan-speak.dk
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