Fountek FR135EX
Full-range
5.5″ / 135 mm
Nominal diameter
62 Hz
Resonance
0.49
Q factor
85 dB
Sensitivity
± 5 mm
Linear excursion
80 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
84.9
dB
Frequency response
50 - 26000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
61.5
Hz
Mechanical quality factor
QMS
1.71
Electrical quality factor
QES
0.69
Total quality factor
QTS
0.49
Large signal parameters
Maximum linear excursion
xmax
5.0
mm
Air volume displaced at xmax
VD
35
cm³
Power handling
P
40
W
Program power
Pmax
80
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.0
Ω
Inductance (1kHz, estimated)
LE
0.28
mH
VC Diameter
32
mm
Winding height
HVC
4
mm
Winding material
Copper
Former material
Black Aluminum
Magnet
Flux density
B
0.88
T
Force factor
Bl
5.03
N/A
Motor constant
Bl/√RE
2.05
N/√W
Air gap height
HAG
14
mm
Material
Neodymium
Diaphragm
Effective diameter
95
mm
Effective area
SD
71
cm²
Moving mass
MMS
7.5
g
Moving mass (without air load)
MMD
7.1
g
Suspensions
Stiffness
KMS
1.13
N/mm
Compliance
CMS
887
µm/N
Equivalent volume to the compliance
VAS
2.26
L
Mechanical resistance
RMS
1.71
N·s/m
Dimensions
Nominal diameter
5.5
″
135
mm
Overall diameter
146
mm
Overall depth
73
mm
Volume occupied by the driver (estimated)
0.32
L
Net weight
0.95
kg
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SpeakerbenchSimilar speaker drivers to Fountek FR135EX
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5.25″Mid-range
fS
59 Hz
SD
87 cm²
70 - 5500 Hz
QTS
0.46
xmax
5.0 mm
SPL1W
86 dB
Bl/√RE
2.68
Pmax
60 W
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