BMS 18N862
Subwoofer
18″ / 458 mm
Nominal diameter
25 Hz
Resonance
0.34
Q factor
93 dB
Sensitivity
± 19 mm
Linear excursion
3000 W
Program Power
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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
Winding material
Copper
Magnet
Force factor
Bl
25.52
N/A
Motor constant
Bl/√RE
10.8
N/√W
Air gap height
HAG
12
mm
Material
Neodymium
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
Frame material
Aluminum
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SD
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SD
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xmax
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