Celestion FTR08-2011D

Low frequency

8″ / 200 mm
Nominal diameter
86 Hz
Resonance
0.44
Q factor
92 dB
Sensitivity
± 5.5 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
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Specifications

Sensitivity (1w, 1m, infinite baffle)
SPL1W
91.9
dB
Frequency response
70 - 6000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
86.1
Hz
Mechanical quality factor
QMS
2.24
Electrical quality factor
QES
0.54
Total quality factor
QTS
0.44

Large signal parameters

Maximum linear excursion
xmax
5.5
mm
Air volume displaced at xmax
VD
125
cm³
Power handling
P
200
W
Program power
Pmax
400
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.8
Ω
Inductance (1kHz)
LE
0.38
mH
VC Diameter
50
mm
Winding height
HVC
15
mm
Winding material
Round copper
Former material
Polyimide

Magnet

Force factor
Bl
12.71
N/A
Motor constant
Bl/√RE
5.27
N/√W
Air gap height
HAG
8
mm
Weight
1.2
kg
Material
Ferrite

Diaphragm

Effective diameter
170
mm
Effective area
SD
227
cm²
Moving mass
MMS
27.8
g
Moving mass (without air load)
MMD
25.1
g
Material
Kevlar loaded paper

Suspensions

Stiffness
KMS
8.33
N/mm
Compliance
CMS
120
µm/N
Equivalent volume to the compliance
VAS
8.99
L
Mechanical resistance
RMS
6.71
N·s/m
Surround material
Cloth-sealed

Dimensions

Nominal diameter
8
200
mm
Overall diameter
225
mm
Baffle cutout diameter
187
mm
Overall depth
102
mm
Volume occupied by the driver (estimated)
1.3
L
Net weight
3.65
kg
Frame material
Cast aluminium
Celestion FTR08-2011D SPL & Impedance

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