15″ / 380 mm
Nominal diameter
42 Hz
Resonance
0.34
Q factor
97 dB
Sensitivity
± 6.5 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
96.7
dB
Frequency response
42 - 4500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
42.0
Hz
Mechanical quality factor
QMS
7.20
Electrical quality factor
QES
0.36
Total quality factor
QTS
0.34
Large signal parameters
Maximum linear excursion
xmax
6.5
mm
Air volume displaced at xmax
VD
553
cm³
Power handling
P
450
W
Program power
Pmax
700
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.0
Ω
Inductance (1kHz)
LE
0.62
mH
VC Diameter
75
mm
Magnet
Force factor
Bl
14.0
N/A
Motor constant
Bl/√RE
8.08
N/√W
Diaphragm
Effective diameter
329
mm
Effective area
SD
850
cm²
Moving mass
MMS
85
g
Moving mass (without air load)
MMD
67.7
g
Material
Weather protected
Suspensions
Stiffness
KMS
5.92
N/mm
Compliance
CMS
169
µm/N
Equivalent volume to the compliance
VAS
157
L
Mechanical resistance
RMS
3.12
N·s/m
Dimensions
Nominal diameter
15
″
380
mm
Overall diameter
387
mm
Baffle cutout diameter
353
mm
Overall depth
177
mm
Flange thickness
11
mm
Mounting depth
166
mm
Volume occupied by the driver (estimated)
2.9
L
Net weight
4.6
kg
Similar subwoofers to Eighteen Sound 15ND830
15″Subwoofer
fS
42 Hz
SD
830 cm²
50 - 3000 Hz
QTS
0.34
xmax
7.8 mm
SPL1W
97 dB
Bl/√RE
8.09
Pmax
1000 W
15″Woofer
fS
40 Hz
SD
855 cm²
40 - 2000 Hz
QTS
0.33
xmax
5.5 mm
SPL1W
96 dB
Bl/√RE
8.38
Pmax
800 W
15″Woofer
fS
40 Hz
SD
881 cm²
40 - 2000 Hz
QTS
0.30
xmax
6.0 mm
SPL1W
97 dB
Bl/√RE
8.32
Pmax
1600 W