Scanspeak D2904-710003 User Manual [ru]

axis response, high output capability and low

TWEETER D2904/710003

The Revelator Tweeters large roll surround technology represents a breakthrough in
overall performance, with outstanding off­resonance 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

· Black Anodized Machined Alu Face Plate

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

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] 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 2.4 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: [phone] · www.scan-speak.dk

TWEETER D2904/710003

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: [phone] · www.scan-speak.dk