Hertz Mille MP 300 D4.3 PRO

2x2Ω
2x4Ω

Subwoofer

12″ / 300 mm
Nominal diameter
24 Hz
Resonance
0.42
Q factor
85 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
Apply
Sensitivity (1w, 1m, infinite baffle)
SPL1W
85.3
dB

Thiele & Small parameters

Resonance frequency (free air)
fS
24.0
Hz
Mechanical quality factor
QMS
5.90
Electrical quality factor
QES
0.45
Total quality factor
QTS
0.42

Large signal parameters

Maximum linear excursion
xmax
17.0
mm
Maximum excursion before damage
xlim
27.0
mm
Air volume displaced at xmax
VD
891
cm³
Power handling
P
600
W
Program power
Pmax
1200
W

Voice Coil

Nominal impedance
Z
2 x 4
Ω
DC resistance (in series)
RE
7.6
Ω
Inductance (1kHz, in series)
LE
6.4
mH
VC Diameter
65
mm

Magnet

Force factor (in series)
Bl
24.0
N/A
Motor constant
Bl/√RE
8.71
N/√W
Diameter
165
mm
Height
35
mm
Material
Ferrite

Diaphragm

Effective diameter
260
mm
Effective area
SD
524
cm²
Moving mass
MMS
235
g
Moving mass (without air load)
MMD
226.2
g
Material
Water-repellent pressed paper

Suspensions

Stiffness
KMS
5.26
N/mm
Compliance
CMS
190
µm/N
Equivalent volume to the compliance
VAS
74
L
Mechanical resistance
RMS
6.01
N·s/m

Dimensions

Nominal diameter
12
300
mm
Overall diameter
321
mm
Baffle cutout diameter
287
mm
Overall depth
187
mm
Flange thickness
23
mm
Mounting depth
164
mm
Volume occupied by the driver (estimated)
4.1
L
Net weight
8.63
kg
Hertz MP 300 D4.3 PRO Impedance

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