Eighteen Sound 15NCX750H
Coaxial
15″ / 380 mm
Nominal diameter
49 Hz
Resonance
0.37
Q factor
99 dB
Sensitivity
± 5.5 mm
Linear excursion
800 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
98.6
dB
Frequency response
50 - 4700
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
49.0
Hz
Mechanical quality factor
QMS
6.32
Electrical quality factor
QES
0.40
Total quality factor
QTS
0.37
Large signal parameters
Maximum linear excursion
xmax
5.5
mm
Air volume displaced at xmax
VD
485
cm³
Power handling
P
400
W
Program power
Pmax
800
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.4
Ω
Inductance (1kHz)
LE
0.66
mH
VC Diameter
75
mm
Winding material
Copper
Magnet
Force factor
Bl
18.5
N/A
Motor constant
Bl/√RE
7.96
N/√W
Material
Neodymium
Diaphragm
Effective diameter
335
mm
Effective area
SD
881
cm²
Moving mass
MMS
80.6
g
Moving mass (without air load)
MMD
62.4
g
Material
Water repellent
Suspensions
Stiffness
KMS
7.63
N/mm
Compliance
CMS
131
µm/N
Equivalent volume to the compliance
VAS
141
L
Mechanical resistance
RMS
3.93
N·s/m
Dimensions
Nominal diameter
15
″
380
mm
Overall diameter
393
mm
Baffle cutout diameter
360
mm
Overall depth
185
mm
Flange thickness
14
mm
Mounting depth
171
mm
Volume occupied by the driver (estimated)
3.4
L
Net weight
5.3
kg
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SpeakerbenchSimilar speaker drivers to Eighteen Sound 15NCX750H
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15″Coaxial
fS
49 Hz
SD
881 cm²
55 - 4500 Hz
QTS
0.37
xmax
5.5 mm
SPL1W
99 dB
Bl/√RE
7.92
Pmax
800 W
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15″Subwoofer
fS
49 Hz
SD
830 cm²
50 - 3500 Hz
QTS
0.34
xmax
5.3 mm
SPL1W
99 dB
Bl/√RE
8.0
Pmax
800 W
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15″Coaxial
fS
46 Hz
SD
829 cm²
50 - 16000 Hz
QTS
0.34
xmax
7.3 mm
SPL1W
98 dB
Bl/√RE
8.17
Pmax
900 W