Eighteen Sound 8CX401F

Coaxial

8″ / 200 mm
Nominal diameter
56 Hz
Resonance
0.34
Q factor
93 dB
Sensitivity
± 5.8 mm
Linear excursion
400 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
93.1
dB
Frequency response
65 - 6100
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
56.0
Hz
Mechanical quality factor
QMS
3.23
Electrical quality factor
QES
0.38
Total quality factor
QTS
0.34

Large signal parameters

Maximum linear excursion
xmax
5.8
mm
Air volume displaced at xmax
VD
132
cm³
Power handling
P
280
W
Program power
Pmax
400
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.0
Ω
Inductance (1kHz)
LE
0.96
mH
VC Diameter
51
mm
Winding material
ISV Aluminum
Former material
Fiberglas

Magnet

Force factor
Bl
9.3
N/A
Motor constant
Bl/√RE
4.16
N/√W
Material
Ferrite

Diaphragm

Effective diameter
170
mm
Effective area
SD
227
cm²
Moving mass
MMS
18
g
Moving mass (without air load)
MMD
15.5
g
Material
Humidity repellent

Suspensions

Stiffness
KMS
2.23
N/mm
Compliance
CMS
449
µm/N
Equivalent volume to the compliance
VAS
23.9
L
Mechanical resistance
RMS
1.96
N·s/m

Dimensions

Nominal diameter
8
200
mm
Overall diameter
210
mm
Baffle cutout diameter
186
mm
Overall depth
150
mm
Flange thickness
14
mm
Mounting depth
136
mm
Volume occupied by the driver (estimated)
1.7
L
Net weight
4.4
kg
Eighteen Sound 8CX401F Impedance
Eighteen Sound 8CX401F SPL
Eighteen Sound 8CX401F Dimensions

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