BMS 18S430v²
Subwoofer
18″ / 458 mm
Nominal diameter
31 Hz
Resonance
0.34
Q factor
95 dB
Sensitivity
± 8 mm
Linear excursion
2400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.9
dB
Frequency response
20 - 200
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
31.0
Hz
Mechanical quality factor
QMS
6.00
Electrical quality factor
QES
0.36
Total quality factor
QTS
0.34
Large signal parameters
Maximum linear excursion
xmax
8.0
mm
Air volume displaced at xmax
VD
970
cm³
Power handling
P
1200
W
Program power
Pmax
2400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
4.8
Ω
Inductance (1kHz)
LE
0.82
mH
VC Diameter
102
mm
Winding height
HVC
26
mm
Winding material
Copper
Magnet
Force factor
Bl
23.5
N/A
Motor constant
Bl/√RE
10.7
N/√W
Air gap height
HAG
10
mm
Material
Ferrite
Diaphragm
Effective diameter
393
mm
Effective area
SD
1213
cm²
Moving mass
MMS
210
g
Moving mass (without air load)
MMD
180.8
g
Suspensions
Stiffness
KMS
8.0
N/mm
Compliance
CMS
125
µm/N
Equivalent volume to the compliance
VAS
262
L
Mechanical resistance
RMS
6.82
N·s/m
Dimensions
Nominal diameter
18
″
458
mm
Overall diameter
458
mm
Baffle cutout diameter
414
mm
Overall depth
218
mm
Volume occupied by the driver (estimated)
7.3
L
Net weight
12.8
kg
Frame material
Cast Aluminum
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fS
31 Hz
SD
1212 cm²
20 - 200 Hz
QTS
0.37
xmax
8.0 mm
SPL1W
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Bl/√RE
10
Pmax
2200 W
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fS
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SD
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51 - 1700 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
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