Celestion FTX0820
Coaxial
8″ / 200 mm
Nominal diameter
79 Hz
Resonance
0.28
Q factor
95 dB
Sensitivity
± 4 mm
Linear excursion
400 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.6
dB
Frequency response
70 - 20000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
78.8
Hz
Mechanical quality factor
QMS
2.80
Electrical quality factor
QES
0.31
Total quality factor
QTS
0.28
Large signal parameters
Maximum linear excursion
xmax
4.0
mm
Air volume displaced at xmax
VD
91
cm³
Power handling
P
200
W
Program power
Pmax
400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.9
Ω
Inductance (1kHz)
LE
0.62
mH
VC Diameter
50
mm
Winding height
HVC
12
mm
Winding material
Edgewound copper
Former material
Glass fibre
Magnet
Force factor
Bl
14.56
N/A
Motor constant
Bl/√RE
6.02
N/√W
Air gap height
HAG
8
mm
Weight
1.5
kg
Material
Ferrite
Diaphragm
Effective diameter
170
mm
Effective area
SD
227
cm²
Moving mass
MMS
22.7
g
Moving mass (without air load)
MMD
20
g
Material
Kevlar loaded paper
Suspensions
Stiffness
KMS
5.56
N/mm
Compliance
CMS
180
µm/N
Equivalent volume to the compliance
VAS
13.1
L
Mechanical resistance
RMS
4.01
N·s/m
Surround material
Cloth-sealed
Dimensions
Nominal diameter
8
″
200
mm
Overall diameter
225
mm
Baffle cutout diameter
187
mm
Overall depth
123
mm
Volume occupied by the driver (estimated)
1.5
L
Net weight
4.1
kg
Frame material
Cast aluminium
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8″Woofer
fS
74 Hz
SD
227 cm²
60 - 3000 Hz
QTS
0.26
xmax
4.4 mm
SPL1W
94 dB
Bl/√RE
6.72
Pmax
700 W
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8″Mid Bass
fS
76 Hz
SD
220 cm²
80 - 4000 Hz
QTS
0.28
xmax
6.0 mm
SPL1W
94 dB
Bl/√RE
6.43
Pmax
600 W