Scanspeak R2904-700009 User Manual [ru]
TWEETER R2904/700009
The Revelator tweeter series consist of the revolutionary ring radiator design, which
put an end to some of the design trade-offs in dome designs. The ring radiator still
offers unrivalled performance. 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 optimize airflow in the chambers.
KEY FEATURES:
· 1" Ring Dome Diaphragm
· Patented Symmetrical Drive (SD-2) motor
· Non Resonant Alu Rear Chamber
· Patented Phase Plug Design
· Large Ring Neo Magnet f. High Output
· Black Anodized Machined Alu Face Plate
T-S Parameters
Resonance frequency [fs] 520 Hz
Mechanical Q factor [Qms] 2.90
Electrical Q factor [Qes] 0.38
Total Q factor [Qts] 0.33
Force factor [Bl] 2.8 Tm
Mechanical resistance [Rms] 0.34 kg/s
Moving mass [Mms] 0.3 g
Suspension compliance [Cms] 0.31 mm/N
Effective diaph. diameter [D] 27 mm
Effective piston area [Sd] 5.6 cm²
Equivalent volume [Vas] 0.01 l
Sensitivity (2.83V/1m) 94.5 dB
Ratio Bl/√Re 1.62 N/√W
Ratio fs/Qts 1566 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.
Electrical Data
Nominal impedance [Zn] 4 Ω
Minimum impedance [Zmin] 3.7 Ω
Maximum impedance [Zo] 26.2 Ω
DC resistance [Re] 3 Ω
Voice coil inductance [Le] 0.01 mH
Power Handling
100h RMS noise test (IEC 17.1) - W
Long-term max power (IEC 17.3) - W
Voice Coil and Magnet Data
Voice coil diameter 25 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
N.C. Madsensvej 1 · 6920 Videbæk · Denmark · Phone: +45 6040 5200 · www.scan-speak.dk
TWEETER R2904/700009
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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