Eminence DELTA PRO-12A
Woofer
12″ / 305 mm
Nominal diameter
51 Hz
Resonance
0.35
Q factor
96 dB
Sensitivity
± 4.6 mm
Linear excursion
800 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.8
dB
Frequency response
52 - 4500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
51.0
Hz
Mechanical quality factor
QMS
7.56
Electrical quality factor
QES
0.37
Total quality factor
QTS
0.35
Large signal parameters
Maximum linear excursion
xmax
4.6
mm
Maximum excursion before damage
xlim
13.7
mm
Air volume displaced at xmax
VD
245
cm³
Power handling
P
400
W
Program power
Pmax
800
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.7
Ω
Inductance (1kHz)
LE
0.84
mH
VC Diameter
64
mm
Winding material
Aluminum
Former material
Polyimide
Magnet
Force factor
Bl
15.3
N/A
Motor constant
Bl/√RE
6.4
N/√W
Air gap height
HAG
9.5
mm
Weight
2.268
kg
Material
Ferrite
Diaphragm
Effective diameter
260
mm
Effective area
SD
532
cm²
Moving mass
MMS
48
g
Moving mass (without air load)
MMD
39.2
g
Material
Paper
Suspensions
Stiffness
KMS
4.76
N/mm
Compliance
CMS
210
µm/N
Equivalent volume to the compliance
VAS
81.7
L
Mechanical resistance
RMS
2.03
N·s/m
Surround material
Cloth
Dimensions
Nominal diameter
12
″
305
mm
Overall diameter
315
mm
Baffle cutout diameter
281
mm
Overall depth
158
mm
Volume occupied by the driver
2.55
L
Net weight
7.39
kg
Frame material
Die-cast aluminum
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fS
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SD
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45 - 4000 Hz
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SPL1W
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Bl/√RE
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SD
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fS
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SD
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50 - 5000 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
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