Fountek FW135H

Mid-range

5.25″ / 135 mm
Nominal diameter
59 Hz
Resonance
0.46
Q factor
86 dB
Sensitivity
± 5 mm
Linear excursion
60 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
70 - 5500
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
59.1
Hz
Mechanical quality factor
QMS
1.94
Electrical quality factor
QES
0.61
Total quality factor
QTS
0.46

Large signal parameters

Maximum linear excursion
xmax
5.0
mm
Air volume displaced at xmax
VD
43
cm³
Power handling
P
30
W
Program power
Pmax
60
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
6.8
Ω
Inductance (1kHz, estimated)
LE
0.4
mH
VC Diameter
36
mm
Winding height
HVC
14.4
mm
Winding material
Copper
Former material
Black Aluminum

Magnet

Flux density
B
1.0
T
Force factor
Bl
6.98
N/A
Motor constant
Bl/√RE
2.68
N/√W
Air gap height
HAG
4
mm
Material
Ferrite

Diaphragm

Effective diameter
105
mm
Effective area
SD
87
cm²
Moving mass
MMS
11.2
g
Moving mass (without air load)
MMD
10.6
g

Suspensions

Stiffness
KMS
1.54
N/mm
Compliance
CMS
649
µm/N
Equivalent volume to the compliance
VAS
6.91
L
Mechanical resistance
RMS
2.13
N·s/m

Dimensions

Nominal diameter
5.25
135
mm
Overall diameter
136
mm
Overall depth
78
mm
Volume occupied by the driver (estimated)
0.35
L
Net weight
1.1
kg
Fountek FW135H SPL & Impedance
Fountek FW135H Dimensions

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