BMS 12S305
Woofer
12″ / 318 mm
Nominal diameter
35 Hz
Resonance
0.27
Q factor
93 dB
Sensitivity
± 11 mm
Linear excursion
1600 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
92.6
dB
Frequency response
35 - 2500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
35.0
Hz
Mechanical quality factor
QMS
5.80
Electrical quality factor
QES
0.28
Total quality factor
QTS
0.27
Large signal parameters
Maximum linear excursion
xmax
11.0
mm
Air volume displaced at xmax
VD
567
cm³
Power handling
P
800
W
Program power
Pmax
1600
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.4
Ω
Inductance (1kHz)
LE
0.7
mH
VC Diameter
77
mm
Winding height
HVC
32
mm
Winding material
Copper
Magnet
Force factor
Bl
20.14
N/A
Motor constant
Bl/√RE
8.67
N/√W
Air gap height
HAG
10
mm
Material
Ferrite
Diaphragm
Effective diameter
256
mm
Effective area
SD
515
cm²
Moving mass
MMS
95
g
Moving mass (without air load)
MMD
86.5
g
Suspensions
Stiffness
KMS
4.59
N/mm
Compliance
CMS
218
µm/N
Equivalent volume to the compliance
VAS
82
L
Mechanical resistance
RMS
3.6
N·s/m
Dimensions
Nominal diameter
12
″
318
mm
Overall diameter
318
mm
Baffle cutout diameter
284
mm
Overall depth
153
mm
Volume occupied by the driver (estimated)
3.4
L
Net weight
8.0
kg
Frame material
Cast Aluminum
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fS
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SD
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40 - 1700 Hz
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SD
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fS
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SD
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45 - 3000 Hz
QTS
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xmax
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