Eighteen Sound 12NCX910BE
Coaxial
12″ / 300 mm
Nominal diameter
57 Hz
Resonance
0.3
Q factor
97 dB
Sensitivity
± 6.9 mm
Linear excursion
900 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
96.8
dB
Frequency response
60 - 4000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
57.0
Hz
Mechanical quality factor
QMS
10.00
Electrical quality factor
QES
0.31
Total quality factor
QTS
0.30
Large signal parameters
Maximum linear excursion
xmax
6.9
mm
Air volume displaced at xmax
VD
366
cm³
Power handling
P
450
W
Program power
Pmax
900
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.3
Ω
Inductance (1kHz)
LE
0.78
mH
VC Diameter
75
mm
Magnet
Force factor
Bl
18.1
N/A
Motor constant
Bl/√RE
7.86
N/√W
Material
Neodymium
Diaphragm
Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
53
g
Moving mass (without air load)
MMD
44.4
g
Suspensions
Stiffness
KMS
6.8
N/mm
Compliance
CMS
147
µm/N
Equivalent volume to the compliance
VAS
58
L
Mechanical resistance
RMS
1.9
N·s/m
Dimensions
Nominal diameter
12
″
300
mm
Overall diameter
310
mm
Baffle cutout diameter
283
mm
Overall depth
210
mm
Flange thickness
13
mm
Mounting depth
197
mm
Volume occupied by the driver (estimated)
3.4
L
Net weight
6.0
kg
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12″Coaxial
fS
57 Hz
SD
531 cm²
60 - 4000 Hz
QTS
0.30
xmax
6.9 mm
SPL1W
97 dB
Bl/√RE
7.86
Pmax
900 W
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12″Coaxial
fS
57 Hz
SD
531 cm²
60 - 4000 Hz
QTS
0.30
xmax
6.9 mm
SPL1W
97 dB
Bl/√RE
7.86
Pmax
900 W
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12″Mid-range
fS
57 Hz
SD
573 cm²
60 - 5000 Hz
QTS
0.33
xmax
6.6 mm
SPL1W
96 dB
Bl/√RE
8.47
Pmax
2000 W