P.Audio GM18-100F
Low frequency
18″ / 457 mm
Nominal diameter
36 Hz
Resonance
0.45
Q factor
94 dB
Sensitivity
± 8.25 mm
Linear excursion
2400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
93.9
dB
Frequency response
30 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
36.0
Hz
Mechanical quality factor
QMS
9.90
Electrical quality factor
QES
0.48
Total quality factor
QTS
0.45
Large signal parameters
Maximum linear excursion
xmax
8.25
mm
Air volume displaced at xmax
VD
1011
cm³
Power handling
P
1200
W
Program power
Pmax
2400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
1.0
mH
VC Diameter
102
mm
Winding height
HVC
31.5
mm
Winding material
Round Copper Wire
Former material
Glass fiber
Magnet
Flux density
B
1.0
T
Force factor
Bl
24.04
N/A
Motor constant
Bl/√RE
10.5
N/√W
Air gap height
HAG
15
mm
Material
Ferrite
Diaphragm
Effective diameter
392
mm
Effective area
SD
1225
cm²
Moving mass
MMS
232
g
Moving mass (without air load)
MMD
202
g
Material
Waterproof Paper
Suspensions
Stiffness
KMS
12.35
N/mm
Compliance
CMS
81
µm/N
Equivalent volume to the compliance
VAS
173
L
Mechanical resistance
RMS
5.36
N·s/m
Surround material
Cloth
Spider material
Cotton (Silicone Impregnated)
Dimensions
Nominal diameter
18
″
457
mm
Overall diameter
466
mm
Baffle cutout diameter
430
mm
Overall depth
232
mm
Flange thickness
11
mm
Mounting depth
221
mm
Volume occupied by the driver (estimated)
8.5
L
Net weight
15.2
kg
Frame material
Aluminium
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15″Low frequency
fS
37 Hz
SD
897 cm²
35 - 2000 Hz
QTS
0.43
xmax
6.0 mm
SPL1W
94 dB
Bl/√RE
8.31
Pmax
1400 W
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18″Subwoofer
fS
35 Hz
SD
1212 cm²
35 - 1600 Hz
QTS
0.41
xmax
12.5 mm
SPL1W
94 dB
Bl/√RE
11
Pmax
2400 W
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18″Subwoofer
fS
36 Hz
SD
1164 cm²
35 - 700 Hz
QTS
0.39
xmax
8.0 mm
SPL1W
95 dB
Bl/√RE
10
Pmax
2400 W