VISATON FRS 7 - 4 Ohm
4Ω
8ΩFull-range
2.5″ / 65 mm
Nominal diameter
250 Hz
Resonance
1.22
Q factor
90 dB
Sensitivity
± 0.8 mm
Linear excursion
15 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
89.5
dB
Frequency response
200 - 20000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
250
Hz
Mechanical quality factor
QMS
3.21
Electrical quality factor
QES
1.96
Total quality factor
QTS
1.22
Large signal parameters
Maximum linear excursion
xmax
0.8
mm
Maximum excursion before damage
xlim
1.5
mm
Air volume displaced at xmax
VD
1.8
cm³
Power handling
P
8
W
Program power
Pmax
15
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.6
Ω
Inductance (1kHz)
LE
0.3
mH
VC Diameter
14
mm
Winding height
HVC
3.5
mm
Magnet
Flux density
B
1.2
T
Force factor
Bl
1.7
N/A
Motor constant
Bl/√RE
0.896
N/√W
Air gap height
HAG
2
mm
Diaphragm
Effective diameter
53
mm
Effective area
SD
22
cm²
Moving mass
MMS
0.8
g
Moving mass (without air load)
MMD
0.7
g
Suspensions
Stiffness
KMS
2.29
N/mm
Compliance
CMS
437
µm/N
Equivalent volume to the compliance
VAS
0.3
L
Mechanical resistance
RMS
0.39
N·s/m
Dimensions
Nominal diameter
2.5
″
65
mm
Baffle cutout diameter
61
mm
Net weight
0.2
kg
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SpeakerbenchSimilar speaker drivers to VISATON FRS 7 - 4 Ohm
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2.5″Full-range
fS
250 Hz
SD
22 cm²
200 - 20000 Hz
QTS
1.28
xmax
0.8 mm
SPL1W
89 dB
Bl/√RE
0.783
Pmax
15 W
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2″Full-range
fS
290 Hz
SD
12 cm²
150 - 20000 Hz
QTS
1.15
xmax
0.6 mm
SPL1W
85 dB
Bl/√RE
0.596
Pmax
8 W