18″ / 457 mm
Nominal diameter
41 Hz
Resonance
0.72
Q factor
92 dB
Sensitivity
± 5.25 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
Sensitivity (1w, 1m, infinite baffle)
SPL1W
91.7
dB
Frequency response
40 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
41.0
Hz
Mechanical quality factor
QMS
11.02
Electrical quality factor
QES
0.77
Total quality factor
QTS
0.72
Large signal parameters
Maximum linear excursion
xmax
5.25
mm
Air volume displaced at xmax
VD
643
cm³
Power handling
P
1200
W
Program power
Pmax
2400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.8
Ω
Inductance (1kHz)
LE
1.12
mH
VC Diameter
114
mm
Winding height
HVC
25.5
mm
Former material
Glass fiber
Magnet
Flux density
B
0.9
T
Force factor
Bl
22.9
N/A
Motor constant
Bl/√RE
9.51
N/√W
Air gap height
HAG
15
mm
Diaphragm
Effective diameter
395
mm
Effective area
SD
1225
cm²
Moving mass
MMS
276.9
g
Moving mass (without air load)
MMD
246.9
g
Suspensions
Stiffness
KMS
18.18
N/mm
Compliance
CMS
55
µm/N
Equivalent volume to the compliance
VAS
118
L
Mechanical resistance
RMS
6.47
N·s/m
Spider material
Cotton (Double Silicone)
Dimensions
Nominal diameter
18
″
457
mm
Overall diameter
466
mm
Baffle cutout diameter
426
mm
Overall depth
230
mm
Flange thickness
19
mm
Mounting depth
211
mm
Volume occupied by the driver (estimated)
8.6
L
Net weight
15.5
kg
Similar speaker drivers to P.Audio C18-1000 v3
15″Subwoofer
fS
42 Hz
SD
847 cm²
40 - 4000 Hz
QTS
0.62
xmax
9.0 mm
SPL1W
94 dB
Bl/√RE
6.59
Pmax
1200 W
18″Low frequency
fS
45 Hz
SD
1225 cm²
35 - 1000 Hz
QTS
0.59
xmax
4.9 mm
SPL1W
92 dB
Bl/√RE
11
Pmax
3400 W
18″Low frequency
fS
40 Hz
SD
1225 cm²
40 - 800 Hz
QTS
0.60
xmax
9.0 mm
SPL1W
93 dB
Bl/√RE
11
Pmax
2800 W