3.2″ / 80 mm
Nominal diameter
115 Hz
Resonance
0.55
Q factor
86 dB
Sensitivity
± 0.35 mm
Linear excursion
15 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
86.0
dB
Frequency response
115 - 28000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
115
Hz
Mechanical quality factor
QMS
3.30
Electrical quality factor
QES
0.68
Total quality factor
QTS
0.55
Large signal parameters
Maximum linear excursion
xmax
0.35
mm
Air volume displaced at xmax
VD
1.0
cm³
Power handling
P
5
W
Program power
Pmax
15
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
7.2
Ω
Inductance (1kHz)
LE
0.03
mH
VC Diameter
16
mm
Magnet
Force factor
Bl
3.93
N/A
Motor constant
Bl/√RE
1.46
N/√W
Weight
0.187
kg
Diaphragm
Effective diameter
60
mm
Effective area
SD
28
cm²
Moving mass
MMS
2
g
Moving mass (without air load)
MMD
1.9
g
Suspensions
Stiffness
KMS
1.1
N/mm
Compliance
CMS
909
µm/N
Equivalent volume to the compliance
VAS
1.04
L
Mechanical resistance
RMS
0.44
N·s/m
Dimensions
Nominal diameter
3.2
″
80
mm
Overall diameter
83
mm
Baffle cutout diameter
73
mm
Overall depth
47
mm
Volume occupied by the driver (estimated)
0.1
L
Net weight
0.45
kg
Similar speaker drivers to Fostex FF85WK
3″Mid-range
fS
110 Hz
SD
33 cm²
200 - 20000 Hz
QTS
0.57
xmax
1.1 mm
SPL1W
86 dB
Bl/√RE
1.69
Pmax
100 W
3″Full-range
fS
112 Hz
SD
29 cm²
150 - 20000 Hz
QTS
0.59
xmax
2.7 mm
SPL1W
86 dB
Bl/√RE
1.53
Pmax
70 W
3.3″Full-range
fS
125 Hz
SD
29 cm²
100 - 20000 Hz
QTS
0.49
SPL1W
87 dB
Bl/√RE
1.49
Pmax
50 W