Hertz Mille MP 70.3 PRO
Mid-range
3″ / 70 mm
Nominal diameter
110 Hz
Resonance
0.82
Q factor
84 dB
Sensitivity
± 1.5 mm
Linear excursion
100 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
83.6
dB
Frequency response
180 - 18000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
110
Hz
Mechanical quality factor
QMS
4.60
Electrical quality factor
QES
1.00
Total quality factor
QTS
0.82
Large signal parameters
Maximum linear excursion
xmax
1.5
mm
Air volume displaced at xmax
VD
4.8
cm³
Power handling
P
50
W
Program power
Pmax
100
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.7
Ω
Inductance (1kHz)
LE
0.12
mH
VC Diameter
20
mm
Magnet
Force factor
Bl
2.8
N/A
Motor constant
Bl/√RE
1.46
N/√W
Diameter
20
mm
Height
2
mm
Material
Neodymium
Diaphragm
Effective diameter
65
mm
Effective area
SD
32
cm²
Moving mass
MMS
2.9
g
Moving mass (without air load)
MMD
2.8
g
Material
Pressed-pulp cone with cotton fibers
Suspensions
Stiffness
KMS
1.43
N/mm
Compliance
CMS
700
µm/N
Equivalent volume to the compliance
VAS
1
L
Mechanical resistance
RMS
0.44
N·s/m
Dimensions
Nominal diameter
3
″
70
mm
Overall diameter
88
mm
Baffle cutout diameter
73
mm
Overall depth
50
mm
Flange thickness
6
mm
Mounting depth
44
mm
Volume occupied by the driver (estimated)
0.11
L
Net weight
0.17
kg
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SpeakerbenchSimilar speaker drivers to Hertz MP 70.3 PRO
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3.5″Mid-range
fS
109 Hz
SD
36 cm²
109 - 20000 Hz
QTS
0.79
xmax
2.0 mm
SPL1W
84 dB
Bl/√RE
1.6
Pmax
20 W
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3″Full-range
fS
110 Hz
SD
27 cm²
100 - 20000 Hz
QTS
0.80
xmax
3.4 mm
SPL1W
83 dB
Bl/√RE
1.39
Pmax
50 W
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3.5″Mid-range
fS
109 Hz
SD
36 cm²
109 - 5000 Hz
QTS
0.76
xmax
2.8 mm
SPL1W
84 dB
Bl/√RE
1.65
Pmax
15 W