Focal UTOPIA M 3.5 WM

Mid-range

3.5″ / 89 mm
Nominal diameter
105 Hz
Resonance
0.58
Q factor
84 dB
Sensitivity
± 2.5 mm
Linear excursion
100 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
83.7
dB
Frequency response
200 - 10000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
105
Hz
Mechanical quality factor
QMS
2.00
Electrical quality factor
QES
1.00
Total quality factor
QTS
0.58

Large signal parameters

Maximum linear excursion
xmax
2.5
mm
Air volume displaced at xmax
VD
9.6
cm³
Power handling
P
50
W
Program power
Pmax
100
W

Voice Coil

Nominal impedance
Z
4
Ω
DC resistance
RE
3.1
Ω
Inductance (1kHz, estimated)
LE
0.1
mH
VC Diameter
45
mm
Winding material
Copper Clad Aluminium
Former material
Glass Fiber

Magnet

Force factor
Bl
3.0
N/A
Motor constant
Bl/√RE
1.7
N/√W
Diameter
42
mm
Height
4
mm

Diaphragm

Effective diameter
70
mm
Effective area
SD
39
cm²
Moving mass
MMS
4
g
Moving mass (without air load)
MMD
3.8
g
Material
M-shape W

Suspensions

Stiffness
KMS
2.0
N/mm
Compliance
CMS
500
µm/N
Equivalent volume to the compliance
VAS
1
L
Mechanical resistance
RMS
1.32
N·s/m
Surround material
Butyl

Dimensions

Nominal diameter
3.5
89
mm
Baffle cutout diameter
79
mm
Mounting depth
31
mm
Volume occupied by the driver (estimated)
0.1
L
Net weight
0.25
kg
Focal 3.5 WM SPL & Impedance
Focal 3.5 WM Dimensions

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