8″ / 210 mm
Nominal diameter
71 Hz
Resonance
0.21
Q factor
95 dB
Sensitivity
± 4.4 mm
Linear excursion
700 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
94.9
dB
Frequency response
70 - 4500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
71.0
Hz
Mechanical quality factor
QMS
8.10
Electrical quality factor
QES
0.21
Total quality factor
QTS
0.21
Large signal parameters
Maximum linear excursion
xmax
4.4
mm
Air volume displaced at xmax
VD
100
cm³
Power handling
P
350
W
Program power
Pmax
700
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
0.63
mH
VC Diameter
51
mm
Winding height
HVC
13
mm
Magnet
Force factor
Bl
17.5
N/A
Motor constant
Bl/√RE
7.67
N/√W
Air gap height
HAG
8.5
mm
Diaphragm
Effective diameter
170
mm
Effective area
SD
227
cm²
Moving mass
MMS
28
g
Moving mass (without air load)
MMD
25.5
g
Material
Water,UV repellent
Suspensions
Stiffness
KMS
5.59
N/mm
Compliance
CMS
179
µm/N
Equivalent volume to the compliance
VAS
13
L
Mechanical resistance
RMS
1.54
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
Similar woofers to Eighteen Sound 8NTLW2000
8″Mid Bass
fS
73 Hz
SD
220 cm²
80 - 4000 Hz
QTS
0.24
xmax
4.5 mm
SPL1W
95 dB
Bl/√RE
7.17
Pmax
700 W
8″Mid Bass
fS
80 Hz
SD
220 cm²
80 - 4000 Hz
QTS
0.25
xmax
4.5 mm
SPL1W
95 dB
Bl/√RE
7.53
Pmax
700 W
8″Mid Bass
fS
74 Hz
SD
220 cm²
70 - 5000 Hz
QTS
0.21
xmax
6.0 mm
SPL1W
95 dB
Bl/√RE
7.76
Pmax
400 W