MONACOR SPX-31M
Full-range
3″ / 93 mm
Nominal diameter
110 Hz
Resonance
0.58
Q factor
87 dB
Sensitivity
± 1.1 mm
Linear excursion
40 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
86.8
dB
Frequency response
110 - 20000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
110
Hz
Mechanical quality factor
QMS
3.71
Electrical quality factor
QES
0.69
Total quality factor
QTS
0.58
Large signal parameters
Maximum linear excursion
xmax
1.1
mm
Air volume displaced at xmax
VD
3.5
cm³
Power handling
P
20
W
Program power
Pmax
40
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.4
Ω
Inductance (1kHz)
LE
0.18
mH
VC Diameter
20
mm
Winding material
Kapton
Magnet
Force factor
Bl
3.64
N/A
Motor constant
Bl/√RE
1.44
N/√W
Diameter
68
mm
Weight
0.119
kg
Diaphragm
Effective diameter
64
mm
Effective area
SD
32
cm²
Moving mass
MMS
1.9
g
Moving mass (without air load)
MMD
1.8
g
Suspensions
Stiffness
KMS
1.09
N/mm
Compliance
CMS
920
µm/N
Equivalent volume to the compliance
VAS
1.32
L
Mechanical resistance
RMS
0.35
N·s/m
Dimensions
Nominal diameter
3
″
93
mm
Overall diameter
93
mm
Baffle cutout diameter
71
mm
Overall depth
55
mm
Flange thickness
2
mm
Mounting depth
53
mm
Volume occupied by the driver (estimated)
0.13
L
Net weight
0.49
kg
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SpeakerbenchSimilar speaker drivers to MONACOR SPX-31M
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3″Mid-range
fS
120 Hz
SD
31 cm²
120 - 16000 Hz
QTS
0.55
xmax
0.8 mm
SPL1W
87 dB
Bl/√RE
1.32
Pmax
40 W
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3″Mid-range
fS
120 Hz
SD
31 cm²
120 - 16000 Hz
QTS
0.55
xmax
0.8 mm
SPL1W
87 dB
Bl/√RE
1.33
Pmax
40 W
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3.4″Full-range
fS
120 Hz
SD
37 cm²
75 - 18000 Hz
QTS
0.65
xmax
1.8 mm
SPL1W
87 dB
Bl/√RE
1.47
Pmax
15 W