P.Audio SD18-1700EL

Low frequency

18″ / 457 mm
Nominal diameter
45 Hz
Resonance
0.59
Q factor
92 dB
Sensitivity
± 4.85 mm
Linear excursion
3400 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
92.3
dB
Frequency response
35 - 1000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
45.0
Hz
Mechanical quality factor
QMS
11.10
Electrical quality factor
QES
0.63
Total quality factor
QTS
0.59

Large signal parameters

Maximum linear excursion
xmax
4.85
mm
Air volume displaced at xmax
VD
594
cm³
Power handling
P
1700
W
Program power
Pmax
3400
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
1.02
mH
VC Diameter
114
mm
Winding height
HVC
24.7
mm
Winding material
SV-SQ
Former material
Glass fiber

Magnet

Flux density
B
0.8
T
Force factor
Bl
25.91
N/A
Motor constant
Bl/√RE
11.4
N/√W
Air gap height
HAG
15
mm
Material
Ferrite

Diaphragm

Effective diameter
395
mm
Effective area
SD
1225
cm²
Moving mass
MMS
307.7
g
Moving mass (without air load)
MMD
277.2
g
Material
Waterproof Paper

Suspensions

Stiffness
KMS
21.28
N/mm
Compliance
CMS
47
µm/N
Equivalent volume to the compliance
VAS
99.7
L
Mechanical resistance
RMS
7.84
N·s/m
Surround material
Cloth
Spider material
Cotton (Double Silicone)

Dimensions

Nominal diameter
18
457
mm
Overall diameter
476
mm
Baffle cutout diameter
428
mm
Overall depth
228
mm
Flange thickness
17
mm
Mounting depth
211
mm
Volume occupied by the driver (estimated)
8.2
L
Net weight
14.2
kg
Frame material
Aluminium
P.Audio SD18-1700EL SPL & Impedance
P.Audio SD18-1700EL Dimensions

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