
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