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
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
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
P.Audio 12BM-300B v3 SPL & Impedance
P.Audio 12BM-300B v3 Dimensions

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