Precision Devices PD.185NR1
Subwoofer
18″ / 457 mm
Nominal diameter
34 Hz
Resonance
0.27
Q factor
95 dB
Sensitivity
± 11.75 mm
Linear excursion
2800 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.4
dB
Frequency response
30 - 800
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
34.0
Hz
Mechanical quality factor
QMS
6.17
Electrical quality factor
QES
0.29
Total quality factor
QTS
0.27
Large signal parameters
Maximum linear excursion
xmax
11.75
mm
Air volume displaced at xmax
VD
1368
cm³
Power handling
P
1400
W
Program power
Pmax
2800
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.4
Ω
Inductance (1kHz)
LE
2.49
mH
VC Diameter
127
mm
Winding height
HVC
30.5
mm
Winding material
Copper
Former material
Glass Fibre
Magnet
Flux density
B
1.18
T
Force factor
Bl
29.5
N/A
Motor constant
Bl/√RE
12.7
N/√W
Air gap height
HAG
13
mm
Material
Neodymium
Diaphragm
Effective diameter
385
mm
Effective area
SD
1164
cm²
Moving mass
MMS
216
g
Moving mass (without air load)
MMD
187.2
g
Material
Paper
Suspensions
Stiffness
KMS
10.03
N/mm
Compliance
CMS
100
µm/N
Equivalent volume to the compliance
VAS
102
L
Mechanical resistance
RMS
7.48
N·s/m
Dimensions
Nominal diameter
18
″
457
mm
Overall diameter
474
mm
Baffle cutout diameter
415
mm
Overall depth
200
mm
Flange thickness
15
mm
Mounting depth
185
mm
Volume occupied by the driver (estimated)
7.0
L
Net weight
12.73
kg
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Export this driver to a simulation software:
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Hornresp
QSpeakers
SpeakerSim
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fS
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SD
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30 - 1000 Hz
QTS
0.30
xmax
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SPL1W
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Bl/√RE
18
Pmax
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fS
38 Hz
SD
1164 cm²
30 - 800 Hz
QTS
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xmax
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SPL1W
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fS
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SD
1158 cm²
35 - 1000 Hz
QTS
0.29
xmax
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SPL1W
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Bl/√RE
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