P.Audio C18-1200

Low frequency

18″ / 457 mm
Nominal diameter
38 Hz
Resonance
0.48
Q factor
94 dB
Sensitivity
± 8.5 mm
Linear excursion
2400 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
94.0
dB
Frequency response
35 - 1000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
38.0
Hz
Mechanical quality factor
QMS
9.76
Electrical quality factor
QES
0.50
Total quality factor
QTS
0.48

Large signal parameters

Maximum linear excursion
xmax
8.5
mm
Air volume displaced at xmax
VD
1041
cm³
Power handling
P
1200
W
Program power
Pmax
2400
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.9
Ω
Inductance (1kHz)
LE
0.98
mH
VC Diameter
114
mm
Winding height
HVC
31
mm
Winding material
Copper
Former material
Glass fiber

Magnet

Flux density
B
1.2
T
Force factor
Bl
26.82
N/A
Motor constant
Bl/√RE
11.0
N/√W
Air gap height
HAG
14
mm
Material
Ferrite

Diaphragm

Effective diameter
395
mm
Effective area
SD
1225
cm²
Moving mass
MMS
243.9
g
Moving mass (without air load)
MMD
213.8
g
Material
Waterproof Paper

Suspensions

Stiffness
KMS
14.29
N/mm
Compliance
CMS
70
µm/N
Equivalent volume to the compliance
VAS
149
L
Mechanical resistance
RMS
5.97
N·s/m
Surround material
Cloth
Spider material
Cotton (Double Silicone)

Dimensions

Nominal diameter
18
457
mm
Overall diameter
467
mm
Baffle cutout diameter
425
mm
Overall depth
224
mm
Flange thickness
23
mm
Mounting depth
201
mm
Volume occupied by the driver (estimated)
9.3
L
Net weight
18.1
kg
Frame material
Aluminium
P.Audio C18-1200 SPL & Impedance
P.Audio C18-1200 Dimensions

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