Precision Devices PD.185C001

Subwoofer

18″ / 457 mm
Nominal diameter
32 Hz
Resonance
0.4
Q factor
95 dB
Sensitivity
± 10.5 mm
Linear excursion
1800 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
94.8
dB
Frequency response
30 - 300
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
32.0
Hz
Mechanical quality factor
QMS
8.42
Electrical quality factor
QES
0.42
Total quality factor
QTS
0.40

Large signal parameters

Maximum linear excursion
xmax
10.5
mm
Air volume displaced at xmax
VD
1220
cm³
Power handling
P
900
W
Program power
Pmax
1800
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.9
Ω
Inductance (1kHz)
LE
3.8
mH
VC Diameter
127
mm
Winding height
HVC
25
mm
Winding material
Copper
Former material
Glass Fibre

Magnet

Flux density
B
0.96
T
Force factor
Bl
21.0
N/A
Motor constant
Bl/√RE
8.65
N/√W
Air gap height
HAG
9
mm
Weight
3.0
kg
Material
Ceramic

Diaphragm

Effective diameter
385
mm
Effective area
SD
1162
cm²
Moving mass
MMS
157.2
g
Moving mass (without air load)
MMD
128.5
g
Material
Paper

Suspensions

Stiffness
KMS
6.35
N/mm
Compliance
CMS
157
µm/N
Equivalent volume to the compliance
VAS
302
L
Mechanical resistance
RMS
3.75
N·s/m

Dimensions

Nominal diameter
18
457
mm
Overall diameter
474
mm
Baffle cutout diameter
414
mm
Overall depth
182
mm
Flange thickness
15
mm
Mounting depth
167
mm
Volume occupied by the driver (estimated)
6.7
L
Net weight
13.0
kg
Precision Devices PD.185C001 Impedance
Precision Devices PD.185C001 SPL

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