Rockford Fosgate PM210S4B
Subwoofer
10″ / 254 mm
Nominal diameter
45 Hz
Resonance
0.57
Q factor
87 dB
Sensitivity
± 10 mm
Linear excursion
500 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
86.6
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
45.0
Hz
Mechanical quality factor
QMS
9.00
Electrical quality factor
QES
0.61
Total quality factor
QTS
0.57
Large signal parameters
Maximum linear excursion
xmax
10.0
mm
Air volume displaced at xmax
VD
346
cm³
Power handling
P
250
W
Program power
Pmax
500
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.6
Ω
Inductance (1kHz)
LE
0.3
mH
VC Diameter
51
mm
Former material
Aluminum
Magnet
Force factor
Bl
13.3
N/A
Motor constant
Bl/√RE
7.01
N/√W
Weight
1.54
kg
Diaphragm
Effective diameter
210
mm
Effective area
SD
346
cm²
Moving mass
MMS
105.1
g
Moving mass (without air load)
MMD
100.5
g
Suspensions
Stiffness
KMS
8.4
N/mm
Compliance
CMS
119
µm/N
Equivalent volume to the compliance
VAS
20.2
L
Mechanical resistance
RMS
3.3
N·s/m
Dimensions
Nominal diameter
10
″
254
mm
Baffle cutout diameter
228
mm
Mounting depth
140
mm
Volume occupied by the driver
4.36
L
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10″Subwoofer
fS
45 Hz
SD
346 cm²
QTS
0.57
xmax
10.0 mm
SPL1W
86 dB
Bl/√RE
6.8
Pmax
500 W
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MATCH MW 8BMW-D2 x 2 Ω
8″Shallow Subwoofer
fS
46 Hz
SD
214 cm²
QTS
0.52
xmax
4.0 mm
SPL1W
87 dB
Bl/√RE
4.66
Pmax
400 W