MONACOR SP-40
Full-range
4″ / 103 mm
Nominal diameter
80 Hz
Resonance
0.7
Q factor
84 dB
Sensitivity
± 2 mm
Linear excursion
16 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
83.7
dB
Frequency response
80 - 10000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
80.0
Hz
Mechanical quality factor
QMS
2.50
Electrical quality factor
QES
0.97
Total quality factor
QTS
0.70
Large signal parameters
Maximum linear excursion
xmax
2.0
mm
Air volume displaced at xmax
VD
11
cm³
Power handling
P
8
W
Program power
Pmax
16
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.5
Ω
Inductance (1kHz)
LE
0.2
mH
VC Diameter
26
mm
Winding material
Aluminium
Magnet
Force factor
Bl
4.33
N/A
Motor constant
Bl/√RE
1.7
N/√W
Diameter
70
mm
Weight
0.15
kg
Diaphragm
Effective diameter
84
mm
Effective area
SD
55
cm²
Moving mass
MMS
5.7
g
Moving mass (without air load)
MMD
5.4
g
Suspensions
Stiffness
KMS
1.61
N/mm
Compliance
CMS
620
µm/N
Equivalent volume to the compliance
VAS
2.6
L
Mechanical resistance
RMS
1.15
N·s/m
Dimensions
Nominal diameter
4
″
103 x 103
mm
Overall size
103 x 103
mm
Baffle cutout diameter
95
mm
Overall depth
55
mm
Flange thickness
4
mm
Mounting depth
51
mm
Volume occupied by the driver (estimated)
0.14
L
Net weight
0.46
kg
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SpeakerbenchSimilar speaker drivers to MONACOR SP-40
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3.75″Mid-range
fS
88 Hz
SD
36 cm²
88 - 5000 Hz
QTS
0.76
xmax
2.7 mm
SPL1W
83 dB
Bl/√RE
1.52
Pmax
25 W
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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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