Pride ST 18

Subwoofer

18″ / 457 mm
Nominal diameter
22 Hz
Resonance
0.24
Q factor
91 dB
Sensitivity
± 37.5 mm
Linear excursion
10000 W
Program Power
Discontinued
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
90.5
dB

Thiele & Small parameters

Resonance frequency (free air)
fS
22.1
Hz
Mechanical quality factor
QMS
4.67
Electrical quality factor
QES
0.25
Total quality factor
QTS
0.24

Large signal parameters

Maximum linear excursion
xmax
37.5
mm
Air volume displaced at xmax
VD
4950
cm³
Power handling
P
5000
W
Program power
Pmax
10000
W

Voice Coil

Nominal impedance
Z
1
Ω
DC resistance
RE
0.9
Ω
Inductance (1kHz, estimated)
LE
0.68
mH

Magnet

Force factor
Bl
18.5
N/A
Motor constant
Bl/√RE
19.5
N/√W

Diaphragm

Effective diameter
410
mm
Effective area
SD
1320
cm²
Moving mass
MMS
691.5
g
Moving mass (without air load)
MMD
659.8
g

Suspensions

Stiffness
KMS
13.33
N/mm
Compliance
CMS
75
µm/N
Equivalent volume to the compliance
VAS
185
L
Mechanical resistance
RMS
20.56
N·s/m

Dimensions

Nominal diameter
18
457
mm
Volume occupied by the driver (estimated)
6.9
L


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15Subwoofer
fS
24 Hz
SD
810 cm²
QTS
0.28
xmax
16.4 mm
SPL1W
89 dB
Bl/√RE
13
Pmax
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Pride M35.15 D2 Subwoofer
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fS
27 Hz
SD
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QTS
0.26
xmax
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Bl/√RE
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