15″ / 380 mm
Nominal diameter
50 Hz
Resonance
0.52
Q factor
97 dB
Sensitivity
± 4 mm
Linear excursion
500 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
97.0
dB
Frequency response
50 - 4500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
50.0
Hz
Mechanical quality factor
QMS
9.64
Electrical quality factor
QES
0.55
Total quality factor
QTS
0.52
Large signal parameters
Maximum linear excursion
xmax
4.0
mm
Air volume displaced at xmax
VD
340
cm³
Power handling
P
350
W
Program power
Pmax
500
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
1.04
mH
VC Diameter
65
mm
Magnet
Force factor
Bl
12.6
N/A
Motor constant
Bl/√RE
5.53
N/√W
Diaphragm
Effective diameter
329
mm
Effective area
SD
850
cm²
Moving mass
MMS
55
g
Moving mass (without air load)
MMD
37.7
g
Suspensions
Stiffness
KMS
5.44
N/mm
Compliance
CMS
184
µm/N
Equivalent volume to the compliance
VAS
189
L
Mechanical resistance
RMS
1.79
N·s/m
Dimensions
Nominal diameter
15
″
380
mm
Overall diameter
387
mm
Baffle cutout diameter
353
mm
Overall depth
161
mm
Flange thickness
11
mm
Mounting depth
150
mm
Volume occupied by the driver (estimated)
2.7
L
Net weight
4.3
kg
Similar subwoofers to Eighteen Sound 15W500
15″Mid Bass
fS
45 Hz
SD
856 cm²
64 - 4000 Hz
QTS
0.61
xmax
1.6 mm
SPL1W
97 dB
Bl/√RE
5.24
Pmax
800 W
15″Guitar Speaker
fS
51 Hz
SD
792 cm²
60 - 3500 Hz
QTS
0.45
xmax
2.2 mm
SPL1W
101 dB
Bl/√RE
5.69
Pmax
400 W
15″Woofer
fS
40 Hz
SD
855 cm²
40 - 3000 Hz
QTS
0.40
xmax
4.0 mm
SPL1W
96 dB
Bl/√RE
6.77
Pmax
500 W