Scan-Speak 21W/8555-10

Woofer

8″ / 210 mm
Nominal diameter
20 Hz
Resonance
0.31
Q factor
87 dB
Sensitivity
± 6.5 mm
Linear excursion
160 W
Program Power
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
Sensitivity (1W, 1m, infinite baffle)
SPL1W
86.7
dB
Frequency response
20 - 2500
Hz

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, estimated)
LE
0.63
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
29.6
g
Material
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
210
mm
Volume occupied by the driver
0.64
L
Net weight
2.2
kg
Frame material
Die cast Aluminium
Scan-Speak 21W/8555-10 SPL & Impedance
Scan-Speak 21W/8555-10 Dimensions

Export this driver to a simulation software:

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Similar woofers to Scan-Speak 21W/8555-10

MONACOR SPH-250CTC Subwoofer
10Subwoofer
fS
20 Hz
SD
343 cm²
20 - 3500 Hz
QTS
0.25
xmax
4.5 mm
SPL1W
87 dB
Bl/√RE
5.21
Pmax
300 W