Hertz Mille MP 250 D2.3 PRO

2x2Ω
2x4Ω

Subwoofer

10″ / 250 mm
Nominal diameter
30 Hz
Resonance
0.54
Q factor
83 dB
Sensitivity
± 17 mm
Linear excursion
1200 W
Program Power
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
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Specifications

Sensitivity (1W, 1m, infinite baffle)
SPL1W
83.4
dB

Thiele & Small parameters

Resonance frequency (free air)
fS
30.0
Hz
Mechanical quality factor
QMS
5.92
Electrical quality factor
QES
0.60
Total quality factor
QTS
0.54

Large signal parameters

Maximum linear excursion
xmax
17.0
mm
Maximum excursion before damage
xlim
27.0
mm
Air volume displaced at xmax
VD
603
cm³
Power handling
P
600
W
Program power
Pmax
1200
W

Voice Coil

Nominal impedance
Z
2 x 2
Ω
DC resistance (in series)
RE
3.4
Ω
Inductance (1kHz, in series)
LE
2.6
mH
VC Diameter
65
mm

Magnet

Force factor (in series)
Bl
14.2
N/A
Motor constant
Bl/√RE
7.7
N/√W
Diameter
165
mm
Height
35
mm
Material
Ferrite

Diaphragm

Effective diameter
213
mm
Effective area
SD
355
cm²
Moving mass
MMS
182
g
Moving mass (without air load)
MMD
177.1
g
Material
Pressed-pulp cone with mineral powders

Suspensions

Stiffness
KMS
7.14
N/mm
Compliance
CMS
140
µm/N
Equivalent volume to the compliance
VAS
25
L
Mechanical resistance
RMS
5.79
N·s/m

Dimensions

Nominal diameter
10
250
mm
Overall diameter
268
mm
Baffle cutout diameter
236
mm
Overall depth
160
mm
Flange thickness
19
mm
Mounting depth
141
mm
Volume occupied by the driver (estimated)
3.2
L
Net weight
8.2
kg
Hertz MP 250 D2.3 PRO Impedance

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