
N.C. Madsensvej 1 · 6920 Videbæk · Denmark · Phone: +45 6040 5200 · www.scan-speak.dk
TWEETER R1904/613001
The Discovery series offer traditional design, superior sound, a solid construction, and
a wide range of variants. Combining these elements - plus a wealth of technical
features and finesses - it gives our customers the possibility of acquiring a tailor-made
Scan-Speak solution with very good performance at a reasonable low price point!
KEY FEATURES:
· 3/4" Ring Dome tweeter
· Compact mounting dimentions
· Flange and Nut for doorpanel mounting
· Optimized for Car use
· Wedge House for dashboard mounting
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] 1000 Hz
Mechanical Q factor [Qms] 8.03
Electrical Q factor [Qes] 2.02
Total Q factor [Qts] 1.61
Force factor [Bl] 1.4 Tm
Mechanical resistance [Rms] 0.18 kg/s
Moving mass [Mms] 0.23 g
Suspension compliance [Cms] 0.11 mm/N
Effective diaph. diameter [D] 1.1 mm
Effective piston area [Sd] 3.8 cm²
Equivalent volume [Vas] 0.002 l
Sensitivity (2.83V/1m) 87.0 dB
Ratio Bl/√Re 0.85 N/√W
Ratio fs/Qts 620 Hz
Electrical Data
Nominal impedance [Zn] 4 Ω
Minimum impedance [Zmin] 3.3 Ω
Maximum impedance [Zo] 13.4 Ω
DC resistance [Re] 2.7 Ω
Voice coil inductance [Le] 0.02 mH
Power Handling
100h RMS noise test (IEC 17.1)* 40 W
Long-term max power (IEC 17.3)* - W
*Filter: 2. order HP Butterworth, 3 kHz
Voice Coil and Magnet Data
Voice coil diameter 19 mm
Voice coil height 1.8 mm
Voice coil layers 2
Height of gap 2 mm
Linear excursion ± 0.1 mm
Max mech. excursion ± 1.6 mm
Unit weight 0.05 kg