6.3″ / 160 mm
Nominal diameter
60 Hz
Resonance
0.39
Q factor
93 dB
Sensitivity
± 2.2 mm
Linear excursion
60 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
Sensitivity (1w, 1m, infinite baffle)
SPL1W
92.6
dB
Frequency response
60 - 20000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
60.0
Hz
Mechanical quality factor
QMS
7.30
Electrical quality factor
QES
0.40
Total quality factor
QTS
0.39
Large signal parameters
Maximum linear excursion
xmax
2.2
mm
Air volume displaced at xmax
VD
28
cm³
Power handling
P
20
W
Program power
Pmax
60
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
7.1
Ω
Inductance (1kHz)
LE
0.18
mH
VC Diameter
25
mm
Magnet
Force factor
Bl
7.4
N/A
Motor constant
Bl/√RE
2.78
N/√W
Diameter
120
mm
Weight
0.72
kg
Diaphragm
Effective diameter
128
mm
Effective area
SD
129
cm²
Moving mass
MMS
8.5
g
Moving mass (without air load)
MMD
7.3
g
Suspensions
Stiffness
KMS
1.21
N/mm
Compliance
CMS
830
µm/N
Equivalent volume to the compliance
VAS
19.5
L
Mechanical resistance
RMS
0.44
N·s/m
Dimensions
Nominal diameter
6.3
″
160
mm
Overall diameter
190
mm
Baffle cutout diameter
151
mm
Overall depth
85
mm
Flange thickness
13
mm
Mounting depth
72
mm
Volume occupied by the driver (estimated)
0.74
L
Net weight
2.28
kg
Similar speaker drivers to Fostex FE168NS
8″Mid Bass
fS
60 Hz
SD
210 cm²
70 - 5000 Hz
QTS
0.40
xmax
4.5 mm
SPL1W
91 dB
Bl/√RE
4.26
Pmax
450 W
6.5″Full-range
fS
60 Hz
SD
140 cm²
60 - 20000 Hz
QTS
0.46
xmax
5.0 mm
SPL1W
93 dB
Bl/√RE
2.22
Pmax
60 W
8″Woofer
fS
60 Hz
SD
209 cm²
70 - 5000 Hz
QTS
0.46
xmax
8.7 mm
SPL1W
90 dB
Bl/√RE
4.51
Pmax
400 W