Fountek FR88EX
Full-range
3.5″ / 88 mm
Nominal diameter
95 Hz
Resonance
0.47
Q factor
84 dB
Sensitivity
± 3 mm
Linear excursion
30 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
83.7
dB
Frequency response
95 - 20000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
95.0
Hz
Mechanical quality factor
QMS
1.96
Electrical quality factor
QES
0.62
Total quality factor
QTS
0.47
Large signal parameters
Maximum linear excursion
xmax
3.0
mm
Air volume displaced at xmax
VD
8.2
cm³
Power handling
P
15
W
Program power
Pmax
30
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.0
Ω
Inductance (1kHz)
LE
0.05
mH
VC Diameter
25
mm
Winding height
HVC
4
mm
Winding material
Copper
Former material
Aluminum
Magnet
Flux density
B
0.88
T
Force factor
Bl
3.31
N/A
Motor constant
Bl/√RE
1.35
N/√W
Air gap height
HAG
10
mm
Material
Neodymium
Diaphragm
Effective diameter
59
mm
Effective area
SD
27
cm²
Moving mass
MMS
2.4
g
Moving mass (without air load)
MMD
2.2
g
Suspensions
Stiffness
KMS
0.84
N/mm
Compliance
CMS
1196
µm/N
Equivalent volume to the compliance
VAS
1.27
L
Mechanical resistance
RMS
0.72
N·s/m
Dimensions
Nominal diameter
3.5
″
88
mm
Overall diameter
88
mm
Overall depth
52
mm
Volume occupied by the driver (estimated)
0.11
L
Net weight
0.35
kg
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SpeakerbenchSimilar speaker drivers to Fountek FR88EX
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3″Full-range
fS
94 Hz
SD
31 cm²
90 - 20000 Hz
QTS
0.41
xmax
2.5 mm
SPL1W
85 dB
Bl/√RE
1.85
Pmax
50 W
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3″Full-range
fS
98 Hz
SD
31 cm²
90 - 20000 Hz
QTS
0.47
xmax
2.5 mm
SPL1W
86 dB
Bl/√RE
1.86
Pmax
50 W
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3.5″Full-range
fS
97 Hz
SD
28 cm²
70 - 20000 Hz
QTS
0.52
xmax
5.0 mm
SPL1W
85 dB
Bl/√RE
1.53
Pmax
50 W