mivoc WPT 138
Mid Bass
5.25″ / 13 mm
Nominal diameter
51 Hz
Resonance
0.45
Q factor
86 dB
Sensitivity
± 3.5 mm
Linear excursion
180 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
86.4
dB
Frequency response
51 - 3500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
51.0
Hz
Mechanical quality factor
QMS
3.60
Electrical quality factor
QES
0.52
Total quality factor
QTS
0.45
Large signal parameters
Maximum linear excursion
xmax
3.5
mm
Air volume displaced at xmax
VD
29
cm³
Power handling
P
70
W
Program power
Pmax
180
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.3
Ω
Inductance (1kHz)
LE
0.5
mH
VC Diameter
25
mm
Winding height
HVC
13
mm
Magnet
Force factor
Bl
5.5
N/A
Motor constant
Bl/√RE
2.19
N/√W
Diaphragm
Effective diameter
102
mm
Effective area
SD
82
cm²
Moving mass
MMS
7.9
g
Moving mass (without air load)
MMD
7.3
g
Suspensions
Stiffness
KMS
0.82
N/mm
Compliance
CMS
1216
µm/N
Equivalent volume to the compliance
VAS
11.6
L
Mechanical resistance
RMS
0.7
N·s/m
Dimensions
Nominal diameter
5.25
″
13
mm
Overall diameter
145
mm
Baffle cutout diameter
110
mm
Overall depth
67
mm
Flange thickness
4
mm
Mounting depth
63
mm
Volume occupied by the driver (estimated)
0.31
L
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fS
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SD
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QTS
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SPL1W
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Bl/√RE
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fS
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SD
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SD
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50 - 4000 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
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