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
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
Discard
Apply
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
Fountek FR59EXE SPL
Fountek FR59EXE Dimensions

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