Celestion TFX0615

Coaxial

6.5″ / 165 mm
Nominal diameter
97 Hz
Resonance
0.38
Q factor
93 dB
Sensitivity
± 5.25 mm
Linear excursion
300 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
93.2
dB
Frequency response
100 - 20000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
96.8
Hz
Mechanical quality factor
QMS
3.04
Electrical quality factor
QES
0.43
Total quality factor
QTS
0.38

Large signal parameters

Maximum linear excursion
xmax
5.25
mm
Air volume displaced at xmax
VD
81
cm³
Power handling
P
150
W
Program power
Pmax
300
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.4
Ω
Inductance (1kHz)
LE
0.46
mH
VC Diameter
38
mm
Winding height
HVC
13.5
mm
Winding material
Round copper
Former material
Polyimide

Magnet

Force factor
Bl
9.82
N/A
Motor constant
Bl/√RE
4.23
N/√W
Air gap height
HAG
6
mm
Weight
0.81
kg
Material
Ferrite

Diaphragm

Effective diameter
140
mm
Effective area
SD
154
cm²
Moving mass
MMS
12.6
g
Moving mass (without air load)
MMD
11.2
g
Material
Kevlar loaded paper

Suspensions

Stiffness
KMS
4.76
N/mm
Compliance
CMS
210
µm/N
Equivalent volume to the compliance
VAS
7.18
L
Mechanical resistance
RMS
2.53
N·s/m
Surround material
Cloth-sealed

Dimensions

Nominal diameter
6.5
165
mm
Overall diameter
178
mm
Baffle cutout diameter
145
mm
Overall depth
76
mm
Volume occupied by the driver (estimated)
0.63
L
Net weight
2.1
kg
Frame material
Pressed steel
Celestion TFX0615 SPL & Impedance

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