8″ / 203 mm
Nominal diameter
42 Hz
Resonance
0.46
Q factor
85 dB
Sensitivity
± 7 mm
Linear excursion
250 W
Program Power
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Specifications
Sensitivity (1W, 1m, infinite baffle)
SPL1W
85.3
dB
Frequency response
42 - 800
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
42.0
Hz
Mechanical quality factor
QMS
4.30
Electrical quality factor
QES
0.52
Total quality factor
QTS
0.46
Large signal parameters
Maximum linear excursion
xmax
7.0
mm
Air volume displaced at xmax
VD
144
cm³
Power handling
P
125
W
Program power
Pmax
250
W
Voice Coil
Nominal impedance
Z
2 x 4
Ω
DC resistance (in series)
RE
6.6
Ω
Inductance (1kHz, in series, estimated)
LE
1.01
mH
VC Diameter
38
mm
Magnet
Force factor (in series)
Bl
12.8
N/A
Motor constant
Bl/√RE
4.98
N/√W
Weight
3.29
kg
Diaphragm
Effective diameter
162
mm
Effective area
SD
206
cm²
Moving mass
MMS
51.5
g
Moving mass (without air load)
MMD
49.3
g
Material
Pressed Wool / Paper
Suspensions
Stiffness
KMS
3.58
N/mm
Compliance
CMS
279
µm/N
Equivalent volume to the compliance
VAS
18.4
L
Mechanical resistance
RMS
3.16
N·s/m
Dimensions
Nominal diameter
8
″
203
mm
Baffle cutout diameter
181
mm
Mounting depth
89
mm
Volume occupied by the driver (estimated)
0.85
L
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SD
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Bl/√RE
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SD
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fS
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SD
326 cm²
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QTS
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xmax
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