Eighteen Sound 8NTLS2000
Subwoofer
8″ / 210 mm
Nominal diameter
40 Hz
Resonance
0.19
Q factor
91 dB
Sensitivity
± 7.4 mm
Linear excursion
700 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
91.2
dB
Frequency response
45 - 1200
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
40.0
Hz
Mechanical quality factor
QMS
11.80
Electrical quality factor
QES
0.19
Total quality factor
QTS
0.19
Large signal parameters
Maximum linear excursion
xmax
7.4
mm
Air volume displaced at xmax
VD
168
cm³
Power handling
P
350
W
Program power
Pmax
700
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.4
Ω
Inductance (1kHz)
LE
0.69
mH
VC Diameter
51
mm
Winding height
HVC
19
mm
Magnet
Force factor
Bl
17.2
N/A
Motor constant
Bl/√RE
7.4
N/√W
Air gap height
HAG
8.5
mm
Material
Neodymium
Diaphragm
Effective diameter
170
mm
Effective area
SD
227
cm²
Moving mass
MMS
42
g
Moving mass (without air load)
MMD
39.5
g
Suspensions
Stiffness
KMS
2.65
N/mm
Compliance
CMS
377
µm/N
Equivalent volume to the compliance
VAS
27.5
L
Mechanical resistance
RMS
0.89
N·s/m
Dimensions
Nominal diameter
8
″
210
mm
Overall diameter
210
mm
Baffle cutout diameter
186
mm
Overall depth
121
mm
Flange thickness
9
mm
Mounting depth
112
mm
Volume occupied by the driver (estimated)
0.76
L
Net weight
1.5
kg
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SD
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SD
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