Precision Devices PD.185C003

Subwoofer

18″ / 457 mm
Nominal diameter
33 Hz
Resonance
0.24
Q factor
97 dB
Sensitivity
± 11 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
96.7
dB
Frequency response
30 - 500
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
33.0
Hz
Mechanical quality factor
QMS
10.60
Electrical quality factor
QES
0.23
Total quality factor
QTS
0.24

Large signal parameters

Maximum linear excursion
xmax
11.0
mm
Air volume displaced at xmax
VD
1280
cm³
Power handling
P
1000
W
Program power
Pmax
2000
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.4
Ω
Inductance (1kHz)
LE
2.8
mH
VC Diameter
127
mm
Winding height
HVC
28
mm
Winding material
Copper
Former material
Glass Fibre

Magnet

Flux density
B
1.25
T
Force factor
Bl
31.5
N/A
Motor constant
Bl/√RE
13.6
N/√W
Air gap height
HAG
12
mm
Weight
5.7
kg
Material
Ferrite Y35

Diaphragm

Effective diameter
385
mm
Effective area
SD
1164
cm²
Moving mass
MMS
197
g
Moving mass (without air load)
MMD
168.3
g
Material
Paper

Suspensions

Stiffness
KMS
8.48
N/mm
Compliance
CMS
118
µm/N
Equivalent volume to the compliance
VAS
224
L
Mechanical resistance
RMS
3.85
N·s/m

Dimensions

Nominal diameter
18
457
mm
Overall diameter
473
mm
Baffle cutout diameter
415
mm
Overall depth
194
mm
Flange thickness
15
mm
Mounting depth
179
mm
Volume occupied by the driver (estimated)
9.9
L
Net weight
22.5
kg
Precision Devices PD.185C003 Impedance
Precision Devices PD.185C003 SPL

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