MONACOR SPX-20M
Full-range
2″ / 57 mm
Nominal diameter
157 Hz
Resonance
0.42
Q factor
84 dB
Sensitivity
± 0.5 mm
Linear excursion
30 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
83.8
dB
Frequency response
157 - 22000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
157
Hz
Mechanical quality factor
QMS
4.52
Electrical quality factor
QES
0.46
Total quality factor
QTS
0.42
Large signal parameters
Maximum linear excursion
xmax
0.5
mm
Air volume displaced at xmax
VD
0.7
cm³
Power handling
P
15
W
Program power
Pmax
30
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.9
Ω
Inductance (1kHz)
LE
0.13
mH
VC Diameter
25
mm
Winding material
Kapton
Magnet
Force factor
Bl
4.5
N/A
Motor constant
Bl/√RE
1.71
N/√W
Diameter
39
mm
Diaphragm
Effective diameter
41
mm
Effective area
SD
13
cm²
Moving mass
MMS
1.3
g
Moving mass (without air load)
MMD
1.3
g
Suspensions
Stiffness
KMS
1.32
N/mm
Compliance
CMS
760
µm/N
Equivalent volume to the compliance
VAS
0.2
L
Mechanical resistance
RMS
0.28
N·s/m
Dimensions
Nominal diameter
2
″
57
mm
Overall diameter
57
mm
Baffle cutout diameter
52
mm
Overall depth
38
mm
Flange thickness
4
mm
Mounting depth
34
mm
Net weight
0.17
kg
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SpeakerbenchSimilar speaker drivers to MONACOR SPX-20M
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2″Full-range
fS
155 Hz
SD
15 cm²
120 - 22000 Hz
QTS
0.46
xmax
2.5 mm
SPL1W
83 dB
Bl/√RE
1.94
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2″Full-range
fS
170 Hz
SD
13 cm²
170 - 22000 Hz
QTS
0.47
xmax
1.2 mm
SPL1W
83 dB
Bl/√RE
1.72
Pmax
25 W
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1.5″Full-range
fS
170 Hz
SD
7.8 cm²
100 - 20000 Hz
QTS
0.45
xmax
2.7 mm
SPL1W
83 dB
Bl/√RE
1.18
Pmax
10 W