Fountek FR89EX
Full-range
3.5″ / 89 mm
Nominal diameter
97 Hz
Resonance
0.52
Q factor
85 dB
Sensitivity
± 5 mm
Linear excursion
50 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
85.1
dB
Frequency response
70 - 20000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
97.0
Hz
Mechanical quality factor
QMS
4.89
Electrical quality factor
QES
0.58
Total quality factor
QTS
0.52
Large signal parameters
Maximum linear excursion
xmax
5.0
mm
Air volume displaced at xmax
VD
14
cm³
Power handling
P
25
W
Program power
Pmax
50
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.8
Ω
Inductance (1kHz, estimated)
LE
0.13
mH
VC Diameter
25
mm
Winding height
HVC
5
mm
Winding material
Copper
Former material
Kapton
Magnet
Flux density
B
0.85
T
Force factor
Bl
3.69
N/A
Motor constant
Bl/√RE
1.53
N/√W
Air gap height
HAG
14
mm
Material
Neodymium
Diaphragm
Effective diameter
60
mm
Effective area
SD
28
cm²
Moving mass
MMS
2.2
g
Moving mass (without air load)
MMD
2.1
g
Suspensions
Stiffness
KMS
0.82
N/mm
Compliance
CMS
1217
µm/N
Equivalent volume to the compliance
VAS
1.4
L
Mechanical resistance
RMS
0.27
N·s/m
Dimensions
Nominal diameter
3.5
″
89
mm
Overall diameter
88
mm
Overall depth
47
mm
Volume occupied by the driver (estimated)
0.12
L
Net weight
0.525
kg
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Export this driver to a simulation software:
WinISD
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Hornresp
QSpeakers
SpeakerSim
MfbLabs
SpeakerbenchSimilar speaker drivers to Fountek FR89EX
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3″Full-range
fS
102 Hz
SD
30 cm²
100 - 16000 Hz
QTS
0.56
xmax
1.5 mm
SPL1W
85 dB
Bl/√RE
1.58
Pmax
30 W
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3.5″Full-range
fS
94 Hz
SD
39 cm²
90 - 20000 Hz
QTS
0.57
xmax
2.5 mm
SPL1W
85 dB
Bl/√RE
1.74
Pmax
60 W