Fountek FW168
Mid Bass
6.5″ / 168 mm
Nominal diameter
45 Hz
Resonance
0.4
Q factor
87 dB
Sensitivity
± 4.6 mm
Linear excursion
100 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
87.1
dB
Frequency response
40 - 4000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
45.0
Hz
Mechanical quality factor
QMS
3.25
Electrical quality factor
QES
0.45
Total quality factor
QTS
0.40
Large signal parameters
Maximum linear excursion
xmax
4.6
mm
Air volume displaced at xmax
VD
55
cm³
Power handling
P
50
W
Program power
Pmax
100
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
7.2
Ω
Inductance (1kHz, estimated)
LE
0.51
mH
VC Diameter
36
mm
Winding height
HVC
15
mm
Winding material
Copper
Former material
Black Aluminum
Magnet
Flux density
B
1.0
T
Force factor
Bl
8.2
N/A
Motor constant
Bl/√RE
3.06
N/√W
Air gap height
HAG
5.8
mm
Material
Ferrite
Diaphragm
Effective diameter
123
mm
Effective area
SD
119
cm²
Moving mass
MMS
14.7
g
Moving mass (without air load)
MMD
13.7
g
Suspensions
Stiffness
KMS
1.22
N/mm
Compliance
CMS
821
µm/N
Equivalent volume to the compliance
VAS
16.5
L
Mechanical resistance
RMS
1.28
N·s/m
Dimensions
Nominal diameter
6.5
″
168
mm
Overall diameter
168
mm
Overall depth
80
mm
Volume occupied by the driver (estimated)
0.56
L
Net weight
1.76
kg
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6.5″Mid Bass
fS
49 Hz
SD
125 cm²
70 - 4500 Hz
QTS
0.43
xmax
5.0 mm
SPL1W
87 dB
Bl/√RE
3.03
Pmax
100 W
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7″Woofer
fS
46 Hz
SD
127 cm²
45 - 8000 Hz
QTS
0.34
xmax
6.0 mm
SPL1W
88 dB
Bl/√RE
2.85
Pmax
90 W