Eighteen Sound 15NMB1000
Subwoofer
15″ / 387 mm
Nominal diameter
46 Hz
Resonance
0.24
Q factor
98 dB
Sensitivity
± 6.5 mm
Linear excursion
1800 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
98.4
dB
Frequency response
45 - 2500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
46.0
Hz
Mechanical quality factor
QMS
8.30
Electrical quality factor
QES
0.24
Total quality factor
QTS
0.24
Large signal parameters
Maximum linear excursion
xmax
6.5
mm
Air volume displaced at xmax
VD
556
cm³
Power handling
P
900
W
Program power
Pmax
1800
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.3
Ω
Inductance (1kHz)
LE
0.89
mH
VC Diameter
100
mm
Magnet
Force factor
Bl
25.2
N/A
Motor constant
Bl/√RE
10.9
N/√W
Material
Neodymium
Diaphragm
Effective diameter
330
mm
Effective area
SD
855
cm²
Moving mass
MMS
100
g
Moving mass (without air load)
MMD
82.6
g
Suspensions
Stiffness
KMS
8.33
N/mm
Compliance
CMS
120
µm/N
Equivalent volume to the compliance
VAS
124
L
Mechanical resistance
RMS
3.48
N·s/m
Dimensions
Nominal diameter
15
″
387
mm
Overall diameter
387
mm
Baffle cutout diameter
357
mm
Overall depth
174
mm
Flange thickness
20
mm
Mounting depth
154
mm
Volume occupied by the driver (estimated)
3.5
L
Net weight
6.0
kg
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SD
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QTS
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SD
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SD
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QTS
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xmax
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