MONACOR SPM-100/8
Mid-range
4″ / 102 mm
Nominal diameter
75 Hz
Resonance
0.67
Q factor
85 dB
Sensitivity
± 1 mm
Linear excursion
50 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
85.2
dB
Frequency response
75 - 18000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
75.0
Hz
Mechanical quality factor
QMS
1.96
Electrical quality factor
QES
1.01
Total quality factor
QTS
0.67
Large signal parameters
Maximum linear excursion
xmax
1.0
mm
Air volume displaced at xmax
VD
5.7
cm³
Power handling
P
25
W
Program power
Pmax
50
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
7.2
Ω
Inductance (1kHz)
LE
0.4
mH
VC Diameter
20
mm
Winding material
Aluminium
Magnet
Force factor
Bl
4.1
N/A
Motor constant
Bl/√RE
1.53
N/√W
Diameter
70
mm
Weight
0.22
kg
Diaphragm
Effective diameter
85
mm
Effective area
SD
57
cm²
Moving mass
MMS
4.4
g
Moving mass (without air load)
MMD
4.1
g
Suspensions
Stiffness
KMS
1.25
N/mm
Compliance
CMS
800
µm/N
Equivalent volume to the compliance
VAS
4
L
Mechanical resistance
RMS
1.06
N·s/m
Dimensions
Nominal diameter
4
″
102
mm
Overall diameter
102
mm
Baffle cutout diameter
94
mm
Overall depth
58
mm
Flange thickness
5
mm
Mounting depth
53
mm
Volume occupied by the driver (estimated)
0.15
L
Net weight
0.538
kg
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SpeakerbenchSimilar woofers to MONACOR SPM-100/8
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4″Full-range
fS
85 Hz
SD
53 cm²
80 - 15000 Hz
QTS
0.64
xmax
2.0 mm
SPL1W
85 dB
Bl/√RE
1.58
Pmax
80 W
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4″Mid-range
fS
75 Hz
SD
57 cm²
75 - 18000 Hz
QTS
0.57
xmax
1.5 mm
SPL1W
87 dB
Bl/√RE
1.57
Pmax
80 W
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4″Mid-range
fS
80 Hz
SD
55 cm²
80 - 5000 Hz
QTS
0.55
xmax
1.5 mm
SPL1W
86 dB
Bl/√RE
1.93
Pmax
80 W