N.C. Madsensvej 1 6920 Videbæk Denmark Phone: +45 6040 5200 www.scan-speak.dk
TWEETER
D2904/710002
The Revelator Tweeters large roll surround technology represents a breakthrough in
overall performance, with outstanding off-axis response, high output capability and low
resonance frequency. Additional enhancements have been made to reduce distortion
and power compression, such as large neodymium magnet systems for high
sensitivity, and a careful design to optimise airflow in the chambers.
KEY FEATURES:
1" Coated Textile Diaphragm
Patented Symmetrical Drive (SD-2) motor
Non Resonant Alu Rear Chamber
Large Roll Surround f. Wide Dispersion
Large Ring Neo Magnet f. High Output
Silver Anodized Machined 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]
520 Hz
Mechanical Q factor [Qms]
3.50
Electrical Q factor [Qes]
0.50
Total Q factor [Qts]
0.44
Force factor [Bl]
2.8 Tm
Mechanical resistance [Rms]
0.37 kg/s
Moving mass [Mms]
0.4 g
Suspension compliance [Cms]
0.23 mm/N
Effective diaph. diameter [D]
30 mm
Effective piston area [Sd]
7 cm²
Equivalent volume [Vas]
0.02 l
Sensitivity (2.83V/1m)
94.4 dB
Ratio Bl/√Re
1.62 N/√W
Ratio fs/Qts
1189 Hz
Electrical Data
Nominal impedance [Zn]
4 Ω
Minimum impedance [Zmin]
3.7 Ω
Maximum impedance [Zo]
24.0 Ω
DC resistance [Re]
3 Ω
Voice coil inductance [Le]
0.01 mH
Power Handling
100h RMS noise test (IEC 17.1)*
90 W
Long-term max power (IEC 17.3)*
150 W
*Filter: 2. order HP Butterworth, 2.5 kHz
Voice Coil and Magnet Data
Voice coil diameter
26 mm
Voice coil height
2.1 mm
Voice coil layers
2
Height of gap
2.5 mm
Linear excursion
± 0.2 mm
Max mech. excursion
± 1.6 mm
Unit weight
0.4 kg
