P.Audio 12BM-300B v3
Low frequency
12″ / 305 mm
Nominal diameter
55 Hz
Resonance
0.34
Q factor
97 dB
Sensitivity
± 3.9 mm
Linear excursion
600 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
96.5
dB
Frequency response
45 - 3000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
55.0
Hz
Mechanical quality factor
QMS
5.95
Electrical quality factor
QES
0.36
Total quality factor
QTS
0.34
Large signal parameters
Maximum linear excursion
xmax
3.9
mm
Air volume displaced at xmax
VD
215
cm³
Power handling
P
300
W
Program power
Pmax
600
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.5
Ω
Inductance (1kHz)
LE
0.5
mH
VC Diameter
76
mm
Winding height
HVC
16.8
mm
Winding material
CCA-W
Former material
Glass fiber
Magnet
Flux density
B
1.2
T
Force factor
Bl
17.06
N/A
Motor constant
Bl/√RE
7.27
N/√W
Air gap height
HAG
9
mm
Material
Ferrite
Diaphragm
Effective diameter
264
mm
Effective area
SD
552
cm²
Moving mass
MMS
56.7
g
Moving mass (without air load)
MMD
47.6
g
Material
Paper
Suspensions
Stiffness
KMS
6.9
N/mm
Compliance
CMS
145
µm/N
Equivalent volume to the compliance
VAS
62.4
L
Mechanical resistance
RMS
3.29
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
151
mm
Flange thickness
16
mm
Mounting depth
135
mm
Volume occupied by the driver (estimated)
3.2
L
Net weight
7.4
kg
Frame material
Aluminium
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12″Coaxial
fS
55 Hz
SD
540 cm²
50 - 20000 Hz
QTS
0.37
xmax
9.3 mm
SPL1W
96 dB
Bl/√RE
7.35
Pmax
800 W
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12″Subwoofer
fS
55 Hz
SD
531 cm²
50 - 4600 Hz
QTS
0.33
xmax
8.0 mm
SPL1W
96 dB
Bl/√RE
7.29
Pmax
1200 W
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