P.Audio GST-181200 v3

Low frequency

18″ / 457 mm
Nominal diameter
35 Hz
Resonance
0.54
Q factor
93 dB
Sensitivity
± 6 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
93.2
dB
Frequency response
30 - 1000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
35.0
Hz
Mechanical quality factor
QMS
13.73
Electrical quality factor
QES
0.57
Total quality factor
QTS
0.54

Large signal parameters

Maximum linear excursion
xmax
6.0
mm
Air volume displaced at xmax
VD
735
cm³
Power handling
P
1200
W
Program power
Pmax
2400
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.6
Ω
Inductance (1kHz)
LE
0.76
mH
VC Diameter
102
mm
Winding height
HVC
27
mm
Winding material
Copper
Former material
Glass fiber

Magnet

Flux density
B
1.1
T
Force factor
Bl
22.8
N/A
Motor constant
Bl/√RE
9.63
N/√W
Air gap height
HAG
15
mm
Material
Ferrite

Diaphragm

Effective diameter
397
mm
Effective area
SD
1225
cm²
Moving mass
MMS
238.9
g
Moving mass (without air load)
MMD
208.9
g
Material
Waterproof Paper

Suspensions

Stiffness
KMS
11.77
N/mm
Compliance
CMS
85
µm/N
Equivalent volume to the compliance
VAS
180
L
Mechanical resistance
RMS
3.83
N·s/m
Surround material
Cloth
Spider material
Cotton (Silicone Impregnated)

Dimensions

Nominal diameter
18
457
mm
Overall diameter
467
mm
Baffle cutout diameter
425
mm
Overall depth
235
mm
Flange thickness
21
mm
Mounting depth
214
mm
Volume occupied by the driver (estimated)
8.9
L
Net weight
16.0
kg
Frame material
Aluminium
P.Audio GST-181200 v3 SPL & Impedance
P.Audio GST-181200 v3 Dimensions

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