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
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
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
Eminence DELTA PRO-12A SPL & Impedance

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