Eminence EPS-12C

Guitar Speaker

12″ / 305 mm
Nominal diameter
49 Hz
Resonance
0.24
Q factor
98 dB
Sensitivity
± 3 mm
Linear excursion
450 W
Program Power
Discontinued
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
97.9
dB
Frequency response
65 - 4900
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
49.0
Hz
Mechanical quality factor
QMS
10.20
Electrical quality factor
QES
0.24
Total quality factor
QTS
0.24

Large signal parameters

Maximum linear excursion
xmax
3.0
mm
Maximum excursion before damage
xlim
9.1
mm
Air volume displaced at xmax
VD
156
cm³
Power handling
P
225
W
Program power
Pmax
450
W

Voice Coil

Nominal impedance
Z
4
Ω
DC resistance
RE
3.6
Ω
Inductance (1kHz)
LE
0.42
mH
VC Diameter
76
mm
Winding material
Edge Wound Aluminum
Former material
Kapton

Magnet

Force factor
Bl
14.69
N/A
Motor constant
Bl/√RE
7.8
N/√W
Air gap height
HAG
9.1
mm
Weight
0.31
kg
Material
Neodymium

Diaphragm

Effective diameter
257
mm
Effective area
SD
520
cm²
Moving mass
MMS
47
g
Moving mass (without air load)
MMD
38.5
g
Material
Paper

Suspensions

Stiffness
KMS
4.55
N/mm
Compliance
CMS
220
µm/N
Equivalent volume to the compliance
VAS
82.4
L
Mechanical resistance
RMS
1.42
N·s/m
Surround material
Cloth

Dimensions

Nominal diameter
12
305
mm
Overall diameter
315
mm
Baffle cutout diameter
315
mm
Overall depth
143
mm
Volume occupied by the driver
1.53
L
Net weight
3.22
kg
Frame material
Die Cast Aluminum
Eminence EPS-12C SPL & Impedance

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