18″ / 458 mm
Nominal diameter
25 Hz
Resonance
0.34
Q factor
93 dB
Sensitivity
± 19 mm
Linear excursion
3000 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
93.1
dB
Frequency response
20 - 200
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
25.1
Hz
Mechanical quality factor
QMS
6.75
Electrical quality factor
QES
0.36
Total quality factor
QTS
0.34
Large signal parameters
Maximum linear excursion
xmax
19.0
mm
Air volume displaced at xmax
VD
2316
cm³
Power handling
P
1500
W
Program power
Pmax
3000
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.6
Ω
Inductance (1kHz)
LE
0.81
mH
VC Diameter
102
mm
Winding height
HVC
50
mm
Magnet
Force factor
Bl
25.52
N/A
Motor constant
Bl/√RE
10.8
N/√W
Air gap height
HAG
12
mm
Diaphragm
Effective diameter
394
mm
Effective area
SD
1219
cm²
Moving mass
MMS
267
g
Moving mass (without air load)
MMD
237.6
g
Suspensions
Stiffness
KMS
6.67
N/mm
Compliance
CMS
150
µm/N
Equivalent volume to the compliance
VAS
312
L
Mechanical resistance
RMS
6.24
N·s/m
Dimensions
Nominal diameter
18
″
458
mm
Overall diameter
458
mm
Baffle cutout diameter
412
mm
Overall depth
250
mm
Volume occupied by the driver (estimated)
7.0
L
Net weight
10.5
kg
Similar subwoofers to BMS 18N862
15″Subwoofer
fS
23 Hz
SD
855 cm²
QTS
0.28
xmax
14.0 mm
SPL1W
95 dB
Bl/√RE
7.0
Pmax
1000 W
15″Woofer
fS
25 Hz
SD
820 cm²
25 - 2500 Hz
QTS
0.31
xmax
5.5 mm
SPL1W
93 dB
Bl/√RE
7.96
Pmax
200 W
15″Subwoofer
fS
23 Hz
SD
855 cm²
QTS
0.28
xmax
14.0 mm
SPL1W
96 dB
Bl/√RE
7.06
Pmax
1000 W