Precision Devices PD.124NR1

Mid-range

12″ / 305 mm
Nominal diameter
58 Hz
Resonance
0.35
Q factor
96 dB
Sensitivity
± 8.5 mm
Linear excursion
2000 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
95.7
dB
Frequency response
45 - 4000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
58.0
Hz
Mechanical quality factor
QMS
8.20
Electrical quality factor
QES
0.37
Total quality factor
QTS
0.35

Large signal parameters

Maximum linear excursion
xmax
8.5
mm
Air volume displaced at xmax
VD
459
cm³
Power handling
P
1000
W
Program power
Pmax
2000
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
6.1
Ω
Inductance (1kHz)
LE
2.6
mH
VC Diameter
102
mm
Winding height
HVC
22
mm
Winding material
Copper Clad Aluminium
Former material
Glass Fibre

Magnet

Flux density
B
1.25
T
Force factor
Bl
19.2
N/A
Motor constant
Bl/√RE
7.77
N/√W
Air gap height
HAG
11
mm
Material
Neodymium

Diaphragm

Effective diameter
262
mm
Effective area
SD
540
cm²
Moving mass
MMS
60
g
Moving mass (without air load)
MMD
50.7
g
Material
Paper

Suspensions

Stiffness
KMS
8.4
N/mm
Compliance
CMS
119
µm/N
Equivalent volume to the compliance
VAS
49
L
Mechanical resistance
RMS
2.67
N·s/m

Dimensions

Nominal diameter
12
305
mm
Overall diameter
331
mm
Baffle cutout diameter
280
mm
Overall depth
146
mm
Flange thickness
10
mm
Mounting depth
136
mm
Volume occupied by the driver (estimated)
3.1
L
Net weight
7.0
kg
Precision Devices PD.124NR1 Impedance
Precision Devices PD.124NR1 SPL

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