4.75″ / 121 mm
Nominal diameter
72 Hz
Resonance
0.45
Q factor
85 dB
Sensitivity
100 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
85.2
dB
Frequency response
71 - 4000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
71.5
Hz
Mechanical quality factor
QMS
5.90
Electrical quality factor
QES
0.49
Total quality factor
QTS
0.45
Large signal parameters
Power handling
P
50
W
Program power
Pmax
100
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.0
Ω
Inductance (1kHz)
LE
0.14
mH
VC Diameter
26
mm
Winding height
HVC
12
mm
Magnet
Force factor
Bl
5.5
N/A
Motor constant
Bl/√RE
2.25
N/√W
Air gap height
HAG
4
mm
Weight
0.43
kg
Diaphragm
Effective diameter
83
mm
Effective area
SD
54
cm²
Moving mass
MMS
6.3
g
Moving mass (without air load)
MMD
5.9
g
Suspensions
Stiffness
KMS
0.97
N/mm
Compliance
CMS
1030
µm/N
Equivalent volume to the compliance
VAS
4.25
L
Mechanical resistance
RMS
0.42
N·s/m
Dimensions
Nominal diameter
4.75
″
121
mm
Volume occupied by the driver (estimated)
0.41
L
Net weight
1.04
kg
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Similar speaker drivers to Wavecor WF120BD04/08
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