P.Audio 12BM-500B
Low frequency
12″ / 305 mm
Nominal diameter
52 Hz
Resonance
0.35
Q factor
96 dB
Sensitivity
± 4.8 mm
Linear excursion
1000 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.9
dB
Frequency response
50 - 3000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
52.0
Hz
Mechanical quality factor
QMS
5.94
Electrical quality factor
QES
0.37
Total quality factor
QTS
0.35
Large signal parameters
Maximum linear excursion
xmax
4.8
mm
Air volume displaced at xmax
VD
265
cm³
Power handling
P
500
W
Program power
Pmax
1000
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.6
Ω
Inductance (1kHz)
LE
0.63
mH
VC Diameter
83
mm
Winding height
HVC
19.6
mm
Winding material
CCA-W
Former material
Glass fiber
Magnet
Flux density
B
1.1
T
Force factor
Bl
16.59
N/A
Motor constant
Bl/√RE
7.01
N/√W
Air gap height
HAG
10
mm
Material
Ferrite
Diaphragm
Effective diameter
264
mm
Effective area
SD
552
cm²
Moving mass
MMS
56.1
g
Moving mass (without air load)
MMD
47
g
Material
Paper
Suspensions
Stiffness
KMS
6.17
N/mm
Compliance
CMS
162
µm/N
Equivalent volume to the compliance
VAS
69.8
L
Mechanical resistance
RMS
3.09
N·s/m
Surround material
Cloth
Spider material
Cotton (Single)
Dimensions
Nominal diameter
12
″
305
mm
Overall diameter
314
mm
Baffle cutout diameter
283
mm
Overall depth
148
mm
Flange thickness
18
mm
Mounting depth
130
mm
Volume occupied by the driver (estimated)
3.6
L
Net weight
9.2
kg
Frame material
Aluminium
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fS
50 Hz
SD
530 cm²
50 - 4000 Hz
QTS
0.34
xmax
5.0 mm
SPL1W
96 dB
Bl/√RE
6.71
Pmax
600 W
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fS
51 Hz
SD
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50 - 4000 Hz
QTS
0.36
xmax
2.5 mm
SPL1W
96 dB
Bl/√RE
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Pmax
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15″Triaxial
fS
50 Hz
SD
804 cm²
40 - 22000 Hz
QTS
0.35
xmax
6.0 mm
SPL1W
96 dB
Bl/√RE
9.88
Pmax
2000 W