
N.C. Madsensvej 1 · 6920 Videbæk · Denmark · Phone: +45 6040 5200 · www.scan-speak.dk
TWEETER D2905/990000
D2905/990000 - The original Revelator tweeter - is build on the heritage of our
successful Classic tweeters, continuing with Symmetrical Drive (SD-2) motor design
which includes copper caps, the non resonant chamber and the special treated textile
29mm dome and further optimized optimized for the ultimate performance utilizing a
large machined aluminium wave guide front.
KEY FEATURES:
· Excellent Sound Reproduction
· Patented Symmetrical Drive (SD-2) motor
· Large Wave Guide Front
· 1" Textile Dome Diaphragm
· Wide Surround Textile Diaphragm
· Black Anodized Mashined 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] 500 Hz
Mechanical Q factor [Qms] 4.83
Electrical Q factor [Qes] 0.72
Total Q factor [Qts] 0.63
Force factor [Bl] 3.5 Tm
Mechanical resistance [Rms] 0.29 kg/s
Moving mass [Mms] 0.45 g
Suspension compliance [Cms] 0.23 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) 91 dB
Ratio Bl/√Re 1.61 N/√W
Ratio fs/Qts 795 Hz
Electrical Data
Nominal impedance [Zn] 6 Ω
Minimum impedance [Zmin] 5.6 Ω
Maximum impedance [Zo] 36.1 Ω
DC resistance [Re] 4.7 Ω
Voice coil inductance [Le] 0.01 mH
Power Handling
100h RMS noise test (IEC 17.1)* 225 W
Long-term max power (IEC 17.3)* - W
*Filter: 2. order HP Butterworth, 2.8 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 kg