VISATON FRS 8 - 4 Ohm
4Ω
8ΩFull-range
3.3″ / 80 mm
Nominal diameter
120 Hz
Resonance
0.69
Q factor
84 dB
Sensitivity
± 0.5 mm
Linear excursion
50 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
83.9
dB
Frequency response
100 - 20000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
120
Hz
Mechanical quality factor
QMS
3.61
Electrical quality factor
QES
0.85
Total quality factor
QTS
0.69
Large signal parameters
Maximum linear excursion
xmax
0.5
mm
Maximum excursion before damage
xlim
2.5
mm
Air volume displaced at xmax
VD
1.6
cm³
Power handling
P
30
W
Program power
Pmax
50
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.5
Ω
Inductance (1kHz)
LE
0.4
mH
VC Diameter
20
mm
Winding height
HVC
4.5
mm
Magnet
Flux density
B
0.8
T
Force factor
Bl
2.2
N/A
Motor constant
Bl/√RE
1.18
N/√W
Air gap height
HAG
4
mm
Diaphragm
Effective diameter
63
mm
Effective area
SD
31
cm²
Moving mass
MMS
2.5
g
Moving mass (without air load)
MMD
2.4
g
Suspensions
Stiffness
KMS
1.36
N/mm
Compliance
CMS
734
µm/N
Equivalent volume to the compliance
VAS
1
L
Mechanical resistance
RMS
0.52
N·s/m
Dimensions
Nominal diameter
3.3
″
80
mm
Baffle cutout diameter
73
mm
Volume occupied by the driver (estimated)
0.1
L
Net weight
0.28
kg
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QSpeakers
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SpeakerbenchSimilar speaker drivers to VISATON FRS 8 - 4 Ohm
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3″Mid-range
fS
110 Hz
SD
32 cm²
180 - 18000 Hz
QTS
0.82
xmax
1.5 mm
SPL1W
84 dB
Bl/√RE
1.46
Pmax
100 W
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3.5″Mid-range
fS
109 Hz
SD
36 cm²
109 - 20000 Hz
QTS
0.79
xmax
2.0 mm
SPL1W
84 dB
Bl/√RE
1.6
Pmax
20 W
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3.5″Mid-range
fS
109 Hz
SD
36 cm²
109 - 5000 Hz
QTS
0.76
xmax
2.8 mm
SPL1W
84 dB
Bl/√RE
1.65
Pmax
15 W