Fountek FR59EXE
Full-range
2.5″ / 59 mm
Nominal diameter
139 Hz
Resonance
0.36
Q factor
86 dB
Sensitivity
± 1.4 mm
Linear excursion
20 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
85.5
dB
Frequency response
139 - 20000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
139
Hz
Mechanical quality factor
QMS
1.47
Electrical quality factor
QES
0.48
Total quality factor
QTS
0.36
Large signal parameters
Maximum linear excursion
xmax
1.4
mm
Air volume displaced at xmax
VD
2.4
cm³
Power handling
P
10
W
Program power
Pmax
20
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.9
Ω
Inductance (1kHz, estimated)
LE
0.06
mH
VC Diameter
20
mm
Winding height
HVC
5.8
mm
Winding material
Copper Clad Aluminium
Former material
Aluminum
Magnet
Flux density
B
1.08
T
Force factor
Bl
2.99
N/A
Motor constant
Bl/√RE
1.51
N/√W
Air gap height
HAG
3
mm
Material
Neodymium
Diaphragm
Effective diameter
47
mm
Effective area
SD
17
cm²
Moving mass
MMS
1.3
g
Moving mass (without air load)
MMD
1.2
g
Suspensions
Stiffness
KMS
0.98
N/mm
Compliance
CMS
1026
µm/N
Equivalent volume to the compliance
VAS
0.42
L
Mechanical resistance
RMS
0.76
N·s/m
Dimensions
Nominal diameter
2.5
″
59
mm
Overall diameter
74
mm
Overall depth
32
mm
Net weight
0.221
kg
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SpeakerbenchSimilar speaker drivers to Fountek FR59EXE
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2″Full-range
fS
160 Hz
SD
13 cm²
160 - 20000 Hz
QTS
0.36
xmax
1.0 mm
SPL1W
85 dB
Bl/√RE
1.42
Pmax
16 W
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2.5″Full-range
fS
125 Hz
SD
20 cm²
125 - 20000 Hz
QTS
0.38
xmax
2.9 mm
SPL1W
86 dB
Bl/√RE
2.04
Pmax
50 W
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2″Full-range
fS
155 Hz
SD
13 cm²
155 - 20000 Hz
QTS
0.35
xmax
1.0 mm
SPL1W
87 dB
Bl/√RE
1.49
Pmax
16 W