N.C. Madsensvej 1 6920 Videbæk Denmark Phone: +45 6040 5200 www.scan-speak.dk
WOOFER
22W/8857T00
The Revelator woofers and subwoofers features very rigid cones in paper or aluminium
that operates as a piston over a wide frequency range, in combination with Scan-
Speaks low-loss linear suspension and the patented Symmetrical Drive (SD-1) it
results in very low distortion and a smooth and well behaved frequency response as
well as perfect transient reproduction.
KEY FEATURES:
Patented Symmetrical Drive Motor Design
Low-Loss linear suspension
Die cast Alu Chassis vented below spider
Rigid Black Anodized Alu Cone
Low Damping SBR Rubber Surround
Ferrite Magnet System w. Rubber Boot
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: May 5, 2011.
T-S Parameters
Resonance frequency [fs]
23 Hz
Mechanical Q factor [Qms]
4.90
Electrical Q factor [Qes]
0.32
Total Q factor [Qts]
0.30
Force factor [Bl]
10.1 Tm
Mechanical resistance [Rms]
1.09 kg/s
Moving mass [Mms]
37 g
Suspension compliance [Cms]
1.29 mm/N
Effective diaph. diameter [D]
167 mm
Effective piston area [Sd]
220 cm²
Equivalent volume [Vas]
87.7 l
Sensitivity (2.83V/1m)
86 dB
Ratio Bl/√Re
4.06 N/√W
Ratio fs/Qts
77 Hz
Electrical Data
Nominal impedance [Zn]
8 Ω
Minimum impedance [Zmin]
7.2 Ω
Maximum impedance [Zo]
101 Ω
DC resistance [Re]
6.2 Ω
Voice coil inductance [Le]
0.35 mH
Power Handling
100h RMS noise test (IEC 17.1)
170 W
Long-term max power (IEC 17.3)
- W
Voice Coil and Magnet Data
Voice coil diameter
50 mm
Voice coil height
24 mm
Voice coil layers
2
Height of gap
6 mm
Linear excursion
± 9 mm
Max mech. excursion
± 14 mm
Unit weight
3.6 kg
WOOFER 22W/8857T00 The Revelator woofers and subwoofers features very rigid cones in paper or aluminium that operates as a piston over a wide frequency range, in combination with ScanSpeaks low-loss linear suspension and the patented Symmetrical Drive (SD-1) it results in very low distortion and a
WOOFER 22W/8857T00 Advanced Parameters (Preliminary) Electrical data Resistance [Re'] Free inductance [Leb] Bound inductance [Le] Semi-inductance [Ke] Shunt resistance [Rss] Mechanical Data 6.33 Ω 0.142 mH 4.37 mH 0.0290 SH 3000 Ω Force Factor [Bl] Moving mass [Mms] Compliance [Cms] Mechanical