3″ / 78 mm
Nominal diameter
120 Hz
Resonance
0.55
Q factor
87 dB
Sensitivity
± 0.75 mm
Linear excursion
40 W
Program Power
.jpg)
Sensitivity (1w, 1m, infinite baffle)
SPL1W
87.2
dB
Frequency response
120 - 16000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
120
Hz
Mechanical quality factor
QMS
2.82
Electrical quality factor
QES
0.68
Total quality factor
QTS
0.55
Large signal parameters
Maximum linear excursion
xmax
0.75
mm
Air volume displaced at xmax
VD
2.3
cm³
Power handling
P
20
W
Program power
Pmax
40
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.3
Ω
Inductance (1kHz)
LE
0.1
mH
VC Diameter
19
mm
Winding material
Aluminium
Magnet
Force factor
Bl
2.4
N/A
Motor constant
Bl/√RE
1.32
N/√W
Diameter
70
mm
Weight
0.15
kg
Diaphragm
Effective diameter
63
mm
Effective area
SD
31
cm²
Moving mass
MMS
1.6
g
Moving mass (without air load)
MMD
1.5
g
Suspensions
Stiffness
KMS
0.91
N/mm
Compliance
CMS
1100
µm/N
Equivalent volume to the compliance
VAS
1.5
L
Mechanical resistance
RMS
0.43
N·s/m
Dimensions
Nominal diameter
3
″
78 x 78
mm
Overall size
78 x 78
mm
Baffle cutout diameter
72
mm
Overall depth
43
mm
Flange thickness
0
mm
Mounting depth
43
mm
Volume occupied by the driver (estimated)
0.12
L
Net weight
0.412
kg
.png)
.png)
Export this driver to a simulation software:
WinISD
Basta!
Hornresp
QSpeakers
SpeakerSim
MfbLabs
SpeakerbenchSimilar woofers to MONACOR SP-45/4
.jpg.webp)
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
.jpg.webp)
3″Full-range
fS
110 Hz
SD
32 cm²
110 - 20000 Hz
QTS
0.58
xmax
1.1 mm
SPL1W
87 dB
Bl/√RE
1.44
Pmax
40 W
.png.webp)
3″Full-range
fS
123 Hz
SD
33 cm²
120 - 21000 Hz
QTS
0.62
xmax
2.1 mm
SPL1W
88 dB
Bl/√RE
1.46
Pmax
60 W