Scan-Speak 21W/8555-10
Woofer
8″ / 220 mm
Nominal diameter
20 Hz
Resonance
0.31
Q factor
87 dB
Sensitivity
± 6.5 mm
Linear excursion
160 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
86.8
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
20.0
Hz
Mechanical quality factor
QMS
4.50
Electrical quality factor
QES
0.33
Total quality factor
QTS
0.31
Large signal parameters
Maximum linear excursion
xmax
6.5
mm
Maximum excursion before damage
xlim
12.0
mm
Air volume displaced at xmax
VD
143
cm³
Power handling
P
100
W
Program power
Pmax
160
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.5
Ω
Inductance (1kHz)
LE
0.4
mH
VC Diameter
42
mm
Winding height
HVC
19
mm
Magnet
Force factor
Bl
8.2
N/A
Motor constant
Bl/√RE
3.5
N/√W
Air gap height
HAG
6
mm
Diaphragm
Effective diameter
167
mm
Effective area
SD
220
cm²
Moving mass
MMS
32
g
Moving mass (without air load)
MMD
29.5
g
Material
Air Dried Paper/Carbon Fibre
Suspensions
Stiffness
KMS
0.51
N/mm
Compliance
CMS
1980
µm/N
Equivalent volume to the compliance
VAS
134
L
Mechanical resistance
RMS
0.89
N·s/m
Surround material
SBR Rubber
Dimensions
Nominal diameter
8
″
220
mm
Volume occupied by the driver (estimated)
0.91
L
Net weight
2.2
kg
Frame material
Aluminium
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Export this driver to a simulation software:
WinISD
Basta!
Hornresp
QSpeakers
SpeakerSim
MfbLabs
SpeakerbenchSimilar woofers to Scan-Speak 21W/8555-10
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