Beyma 3FR30
Full-range
3″ / 77 mm
Nominal diameter
160 Hz
Resonance
0.49
Q factor
88 dB
Sensitivity
± 4.5 mm
Linear excursion
60 W
Program Power
Discontinued
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
88.3
dB
Frequency response
160 - 20000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
160
Hz
Mechanical quality factor
QMS
8.00
Electrical quality factor
QES
0.52
Total quality factor
QTS
0.49
Large signal parameters
Maximum linear excursion
xmax
4.5
mm
Air volume displaced at xmax
VD
14
cm³
Power handling
P
30
W
Program power
Pmax
60
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.6
Ω
Inductance (1kHz)
LE
0.25
mH
VC Diameter
20
mm
Winding height
HVC
10.5
mm
Magnet
Force factor
Bl
4.9
N/A
Motor constant
Bl/√RE
2.07
N/√W
Air gap height
HAG
3
mm
Material
Ferrite
Diaphragm
Effective diameter
62
mm
Effective area
SD
30
cm²
Moving mass
MMS
2.2
g
Moving mass (without air load)
MMD
2.1
g
Suspensions
Stiffness
KMS
2.33
N/mm
Compliance
CMS
430
µm/N
Equivalent volume to the compliance
VAS
0.67
L
Mechanical resistance
RMS
0.28
N·s/m
Dimensions
Nominal diameter
3
″
77
mm
Volume occupied by the driver (estimated)
0.22
L
Net weight
0.57
kg
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3″Full-range
fS
133 Hz
SD
30 cm²
135 - 20000 Hz
QTS
0.51
xmax
2.0 mm
SPL1W
87 dB
Bl/√RE
1.87
Pmax
60 W
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