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
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
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
mivoc WPT 138 SPL
mivoc WPT 138 Waterfall

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