Eminence DEFINIMAX 4012ULF-8
Subwoofer
12″ / 305 mm
Nominal diameter
40 Hz
Resonance
0.31
Q factor
91 dB
Sensitivity
± 6.7 mm
Linear excursion
2400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
91.3
dB
Frequency response
37 - 200
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
40.0
Hz
Mechanical quality factor
QMS
12.13
Electrical quality factor
QES
0.32
Total quality factor
QTS
0.31
Large signal parameters
Maximum linear excursion
xmax
6.7
mm
Maximum excursion before damage
xlim
15.5
mm
Air volume displaced at xmax
VD
365
cm³
Power handling
P
1200
W
Program power
Pmax
2400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.2
Ω
Inductance (1kHz)
LE
4.32
mH
VC Diameter
102
mm
Winding material
Copper
Former material
Kapton
Magnet
Force factor
Bl
27.38
N/A
Motor constant
Bl/√RE
11.0
N/√W
Air gap height
HAG
9.5
mm
Weight
3.09
kg
Material
Ferrite
Diaphragm
Effective diameter
264
mm
Effective area
SD
545
cm²
Moving mass
MMS
153
g
Moving mass (without air load)
MMD
144
g
Material
Water resistant paper
Suspensions
Stiffness
KMS
10.0
N/mm
Compliance
CMS
100
µm/N
Equivalent volume to the compliance
VAS
41.3
L
Mechanical resistance
RMS
3.17
N·s/m
Surround material
Cloth
Dimensions
Nominal diameter
12
″
305
mm
Overall diameter
315
mm
Baffle cutout diameter
281
mm
Overall depth
135
mm
Volume occupied by the driver
3.0
L
Net weight
10.12
kg
Frame material
Die-cast aluminum
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fS
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SD
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QTS
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SPL1W
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Bl/√RE
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SD
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40 - 1000 Hz
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SD
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xmax
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