D.A.S. Audio 18SX

Low frequency

18″ / 457 mm
Nominal diameter
39 Hz
Resonance
0.47
Q factor
94 dB
Sensitivity
± 8 mm
Linear excursion
2000 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
94.3
dB
Frequency response
25 - 2000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
39.2
Hz
Mechanical quality factor
QMS
4.57
Electrical quality factor
QES
0.49
Total quality factor
QTS
0.47

Large signal parameters

Maximum linear excursion
xmax
8.0
mm
Air volume displaced at xmax
VD
931
cm³
Power handling
P
1000
W
Program power
Pmax
2000
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
6.1
Ω
Inductance (1kHz)
LE
2.44
mH
VC Diameter
102
mm
Winding material
Copper

Magnet

Force factor
Bl
23.53
N/A
Motor constant
Bl/√RE
9.53
N/√W
Material
Ferrite

Diaphragm

Effective diameter
385
mm
Effective area
SD
1164
cm²
Moving mass
MMS
185.1
g
Moving mass (without air load)
MMD
157.2
g

Suspensions

Stiffness
KMS
11.24
N/mm
Compliance
CMS
89
µm/N
Equivalent volume to the compliance
VAS
172
L
Mechanical resistance
RMS
9.98
N·s/m

Dimensions

Nominal diameter
18
457
mm
Volume occupied by the driver (estimated)
6.9
L
Frame material
Injected Aluminum
D.A.S. Audio 18SX SPL

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