Precision Devices PD.123C001

Mid-range

12″ / 305 mm
Nominal diameter
35 Hz
Resonance
0.14
Q factor
97 dB
Sensitivity
± 7.5 mm
Linear excursion
800 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
96.8
dB
Frequency response
45 - 4000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
35.0
Hz
Mechanical quality factor
QMS
7.50
Electrical quality factor
QES
0.15
Total quality factor
QTS
0.14

Large signal parameters

Maximum linear excursion
xmax
7.5
mm
Air volume displaced at xmax
VD
410
cm³
Power handling
P
400
W
Program power
Pmax
800
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.5
Ω
Inductance (1kHz)
LE
2.17
mH
VC Diameter
76
mm
Winding height
HVC
21
mm
Winding material
Copper
Former material
Glass Fibre

Magnet

Flux density
B
1.2
T
Force factor
Bl
24.5
N/A
Motor constant
Bl/√RE
10.4
N/√W
Air gap height
HAG
11
mm
Weight
3.3
kg
Material
Ferrite Y30

Diaphragm

Effective diameter
264
mm
Effective area
SD
547
cm²
Moving mass
MMS
70
g
Moving mass (without air load)
MMD
60.6
g

Suspensions

Stiffness
KMS
3.47
N/mm
Compliance
CMS
288
µm/N
Equivalent volume to the compliance
VAS
122
L
Mechanical resistance
RMS
2.05
N·s/m

Dimensions

Nominal diameter
12
305
mm
Overall diameter
331
mm
Baffle cutout diameter
279
mm
Overall depth
121
mm
Flange thickness
10
mm
Mounting depth
111
mm
Volume occupied by the driver (estimated)
3.4
L
Net weight
9.7
kg
Precision Devices PD.123C001 Impedance
Precision Devices PD.123C001 SPL

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