Precision Devices PD.123C01
Subwoofer
12″ / 300 mm
Nominal diameter
46 Hz
Resonance
0.31
Q factor
95 dB
Sensitivity
± 7 mm
Linear excursion
800 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.8
dB
Frequency response
45 - 3500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
46.0
Hz
Mechanical quality factor
QMS
16.18
Electrical quality factor
QES
0.32
Total quality factor
QTS
0.31
Large signal parameters
Maximum linear excursion
xmax
7.0
mm
Maximum excursion before damage
xlim
22.0
mm
Air volume displaced at xmax
VD
372
cm³
Power handling
P
400
W
Program power
Pmax
800
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.9
Ω
Inductance (1kHz)
LE
0.85
mH
VC Diameter
76
mm
Winding height
HVC
19
mm
Winding material
Copper
Former material
Glass Fibre
Magnet
Flux density
B
1.1
T
Force factor
Bl
19.22
N/A
Motor constant
Bl/√RE
7.93
N/√W
Air gap height
HAG
9
mm
Material
Ferrite
Diaphragm
Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
68.6
g
Moving mass (without air load)
MMD
59.5
g
Material
Paper
Suspensions
Stiffness
KMS
5.88
N/mm
Compliance
CMS
170
µm/N
Equivalent volume to the compliance
VAS
66.8
L
Mechanical resistance
RMS
1.22
N·s/m
Dimensions
Nominal diameter
12
″
300
mm
Overall diameter
330
mm
Baffle cutout diameter
282
mm
Overall depth
127
mm
Flange thickness
10
mm
Mounting depth
117
mm
Volume occupied by the driver (estimated)
3.0
L
Net weight
7.9
kg
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SD
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SD
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SD
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