12″ / 305 mm
Nominal diameter
75 Hz
Resonance
0.53
Q factor
101 dB
Sensitivity
± 1.24 mm
Linear excursion
80 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
Sensitivity (1w, 1m, infinite baffle)
SPL1W
100.8
dB
Frequency response
80 - 5000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
75.0
Hz
Mechanical quality factor
QMS
20.09
Electrical quality factor
QES
0.54
Total quality factor
QTS
0.53
Large signal parameters
Maximum linear excursion
xmax
1.24
mm
Air volume displaced at xmax
VD
64
cm³
Power handling
P
40
W
Program power
Pmax
80
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
7.0
Ω
Inductance (1kHz)
LE
0.6
mH
VC Diameter
44
mm
Magnet
Force factor
Bl
12.08
N/A
Motor constant
Bl/√RE
4.57
N/√W
Air gap height
HAG
8
mm
Weight
0.992
kg
Diaphragm
Effective diameter
257
mm
Effective area
SD
520
cm²
Moving mass
MMS
24
g
Moving mass (without air load)
MMD
15.6
g
Suspensions
Stiffness
KMS
5.26
N/mm
Compliance
CMS
190
µm/N
Equivalent volume to the compliance
VAS
71.2
L
Mechanical resistance
RMS
0.56
N·s/m
Dimensions
Nominal diameter
12
″
305
mm
Overall diameter
309
mm
Baffle cutout diameter
283
mm
Overall depth
159
mm
Volume occupied by the driver
2.24
L
Net weight
3.81
kg
Frame material
Pressed steel
Similar speaker drivers to Eminence EJ-1240
12″Guitar Speaker
fS
76 Hz
SD
532 cm²
80 - 5000 Hz
QTS
0.59
xmax
1.2 mm
SPL1W
100 dB
Bl/√RE
4.82
Pmax
130 W
12″Guitar Speaker
fS
73 Hz
SD
520 cm²
80 - 5000 Hz
QTS
0.62
xmax
1.2 mm
SPL1W
100 dB
Bl/√RE
4.12
Pmax
80 W
12″Guitar Speaker
fS
82 Hz
SD
545 cm²
80 - 4500 Hz
QTS
0.56
xmax
0.8 mm
SPL1W
101 dB
Bl/√RE
4.84
Pmax
200 W