15″ / 380 mm
Nominal diameter
55 Hz
Resonance
0.33
Q factor
98 dB
Sensitivity
± 7 mm
Linear excursion
900 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
98.2
dB
Frequency response
50 - 4000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
55.0
Hz
Mechanical quality factor
QMS
8.20
Electrical quality factor
QES
0.34
Total quality factor
QTS
0.33
Large signal parameters
Maximum linear excursion
xmax
7.0
mm
Air volume displaced at xmax
VD
617
cm³
Power handling
P
450
W
Program power
Pmax
900
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.0
Ω
Inductance (1kHz)
LE
1.1
mH
VC Diameter
75
mm
Magnet
Force factor
Bl
21.0
N/A
Motor constant
Bl/√RE
9.39
N/√W
Diaphragm
Effective diameter
335
mm
Effective area
SD
881
cm²
Moving mass
MMS
86
g
Moving mass (without air load)
MMD
67.8
g
Suspensions
Stiffness
KMS
10.31
N/mm
Compliance
CMS
97
µm/N
Equivalent volume to the compliance
VAS
107
L
Mechanical resistance
RMS
3.62
N·s/m
Dimensions
Nominal diameter
15
″
380
mm
Overall diameter
393
mm
Baffle cutout diameter
360
mm
Overall depth
205
mm
Flange thickness
14
mm
Mounting depth
191
mm
Volume occupied by the driver (estimated)
4.1
L
Net weight
6.5
kg
Similar speaker drivers to Eighteen Sound 15NCX910BE
15″Coaxial
fS
55 Hz
SD
881 cm²
50 - 4000 Hz
QTS
0.33
xmax
7.0 mm
SPL1W
98 dB
Bl/√RE
9.39
Pmax
900 W
15″Coaxial
fS
55 Hz
SD
881 cm²
50 - 4000 Hz
QTS
0.33
xmax
7.0 mm
SPL1W
98 dB
Bl/√RE
9.39
Pmax
900 W
15″Coaxial
fS
55 Hz
SD
900 cm²
40 - 20000 Hz
QTS
0.26
xmax
6.0 mm
SPL1W
99 dB
Bl/√RE
9.93
Pmax
900 W