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
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
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
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
Similar speaker drivers to Fountek FW135H
5.5″Full-range
fS
62 Hz
SD
71 cm²
50 - 26000 Hz
QTS
0.49
xmax
5.0 mm
SPL1W
85 dB
Bl/√RE
2.05
Pmax
80 W
4″Mid-range
fS
55 Hz
SD
55 cm²
55 - 8000 Hz
QTS
0.37
xmax
2.0 mm
SPL1W
86 dB
Bl/√RE
1.8
Pmax
60 W
4″Mid-range
fS
53 Hz
SD
55 cm²
53 - 8000 Hz
QTS
0.37
xmax
2.0 mm
SPL1W
86 dB
Bl/√RE
1.82
Pmax
60 W