Focal UTOPIA M 8 WM
Woofer
8″ / 203 mm
Nominal diameter
49 Hz
Resonance
0.9
Q factor
88 dB
Sensitivity
± 5.5 mm
Linear excursion
200 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
87.9
dB
Frequency response
45 - 50000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
49.0
Hz
Mechanical quality factor
QMS
9.00
Electrical quality factor
QES
1.00
Total quality factor
QTS
0.90
Large signal parameters
Maximum linear excursion
xmax
5.5
mm
Air volume displaced at xmax
VD
119
cm³
Power handling
P
100
W
Program power
Pmax
200
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
2.7
Ω
Inductance (1kHz, estimated)
LE
0.25
mH
VC Diameter
80
mm
Winding material
Copper Clad Aluminium
Former material
Glass Fiber
Magnet
Force factor
Bl
4.4
N/A
Motor constant
Bl/√RE
2.68
N/√W
Diameter
75
mm
Height
4
mm
Diaphragm
Effective diameter
166
mm
Effective area
SD
216
cm²
Moving mass
MMS
23
g
Moving mass (without air load)
MMD
20.7
g
Material
M-shape W
Suspensions
Stiffness
KMS
2.22
N/mm
Compliance
CMS
450
µm/N
Equivalent volume to the compliance
VAS
30
L
Mechanical resistance
RMS
0.79
N·s/m
Surround material
Butyl
Dimensions
Nominal diameter
8
″
203
mm
Baffle cutout diameter
185
mm
Mounting depth
52
mm
Volume occupied by the driver (estimated)
0.48
L
Net weight
1.2
kg
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