Precision Devices PD.1225C001

Mid-range

12″ / 305 mm
Nominal diameter
39 Hz
Resonance
0.19
Q factor
97 dB
Sensitivity
± 5.6 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
97.2
dB
Frequency response
45 - 5000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
39.0
Hz
Mechanical quality factor
QMS
5.90
Electrical quality factor
QES
0.20
Total quality factor
QTS
0.19

Large signal parameters

Maximum linear excursion
xmax
5.6
mm
Air volume displaced at xmax
VD
308
cm³
Power handling
P
300
W
Program power
Pmax
600
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
1.33
mH
VC Diameter
64
mm
Winding height
HVC
15.8
mm
Winding material
Copper Clad Aluminium
Former material
Glass Fibre

Magnet

Flux density
B
1.1
T
Force factor
Bl
17.54
N/A
Motor constant
Bl/√RE
7.69
N/√W
Air gap height
HAG
9
mm
Weight
2.45
kg
Material
Ferrite Y30

Diaphragm

Effective diameter
265
mm
Effective area
SD
550
cm²
Moving mass
MMS
48.3
g
Moving mass (without air load)
MMD
38.8
g

Suspensions

Stiffness
KMS
2.75
N/mm
Compliance
CMS
363
µm/N
Equivalent volume to the compliance
VAS
156
L
Mechanical resistance
RMS
2.01
N·s/m

Dimensions

Nominal diameter
12
305
mm
Overall diameter
331
mm
Baffle cutout diameter
279
mm
Overall depth
113
mm
Flange thickness
10
mm
Mounting depth
103
mm
Volume occupied by the driver (estimated)
3.0
L
Net weight
8.45
kg
Precision Devices PD.1225C001 Impedance
Precision Devices PD.1225C001 SPL

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