P.Audio C18-650EL v3
Low frequency
18″ / 457 mm
Nominal diameter
41 Hz
Resonance
0.52
Q factor
96 dB
Sensitivity
± 5.25 mm
Linear excursion
2000 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.5
dB
Frequency response
35 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
41.0
Hz
Mechanical quality factor
QMS
12.26
Electrical quality factor
QES
0.55
Total quality factor
QTS
0.52
Large signal parameters
Maximum linear excursion
xmax
5.25
mm
Air volume displaced at xmax
VD
643
cm³
Power handling
P
1000
W
Program power
Pmax
2000
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.6
Ω
Inductance (1kHz)
LE
0.83
mH
VC Diameter
99
mm
Winding height
HVC
25.5
mm
Winding material
Flat aluminium wire
Former material
Glass fiber
Magnet
Flux density
B
1.0
T
Force factor
Bl
21.46
N/A
Motor constant
Bl/√RE
9.07
N/√W
Air gap height
HAG
15
mm
Material
Ferrite
Diaphragm
Effective diameter
396
mm
Effective area
SD
1225
cm²
Moving mass
MMS
172.4
g
Moving mass (without air load)
MMD
143.7
g
Material
Paper
Suspensions
Stiffness
KMS
11.91
N/mm
Compliance
CMS
84
µm/N
Equivalent volume to the compliance
VAS
179
L
Mechanical resistance
RMS
3.62
N·s/m
Surround material
Cloth
Spider material
Cotton (Double)
Dimensions
Nominal diameter
18
″
457
mm
Overall diameter
446
mm
Baffle cutout diameter
426
mm
Overall depth
226
mm
Flange thickness
19
mm
Mounting depth
207
mm
Volume occupied by the driver (estimated)
7.7
L
Net weight
13.9
kg
Frame material
Aluminium
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15″Mid Bass
fS
40 Hz
SD
897 cm²
40 - 5000 Hz
QTS
0.49
xmax
5.0 mm
SPL1W
96 dB
Bl/√RE
6.44
Pmax
800 W
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19″Low frequency
fS
42 Hz
SD
1555 cm²
40 - 1000 Hz
QTS
0.49
xmax
9.0 mm
SPL1W
95 dB
Bl/√RE
12
Pmax
2400 W
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15″Woofer
fS
43 Hz
SD
855 cm²
45 - 3000 Hz
QTS
0.49
xmax
4.7 mm
SPL1W
95 dB
Bl/√RE
6.86
Pmax
500 W