Fostex P800K
Full-range
3.2″ / 80 mm
Nominal diameter
115 Hz
Resonance
0.99
Q factor
83 dB
Sensitivity
± 0.5 mm
Linear excursion
24 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
83.3
dB
Frequency response
115 - 18000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
115
Hz
Mechanical quality factor
QMS
3.79
Electrical quality factor
QES
1.33
Total quality factor
QTS
0.99
Large signal parameters
Maximum linear excursion
xmax
0.5
mm
Air volume displaced at xmax
VD
1.4
cm³
Power handling
P
8
W
Program power
Pmax
24
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
7.2
Ω
Inductance (1kHz)
LE
0.04
mH
VC Diameter
20
mm
Magnet
Force factor
Bl
2.98
N/A
Motor constant
Bl/√RE
1.11
N/√W
Weight
0.074
kg
Diaphragm
Effective diameter
60
mm
Effective area
SD
28
cm²
Moving mass
MMS
2.2
g
Moving mass (without air load)
MMD
2.1
g
Suspensions
Stiffness
KMS
1.15
N/mm
Compliance
CMS
873
µm/N
Equivalent volume to the compliance
VAS
1.04
L
Mechanical resistance
RMS
0.42
N·s/m
Dimensions
Nominal diameter
3.2
″
80
mm
Overall diameter
80
mm
Baffle cutout diameter
73
mm
Overall depth
47
mm
Volume occupied by the driver (estimated)
0.15
L
Net weight
0.261
kg
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QSpeakers
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SpeakerbenchSimilar speaker drivers to Fostex P800K
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3″Full-range
fS
110 Hz
SD
27 cm²
100 - 20000 Hz
QTS
1.00
xmax
3.4 mm
SPL1W
83 dB
Bl/√RE
1.19
Pmax
50 W
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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″Full-range
fS
110 Hz
SD
27 cm²
100 - 20000 Hz
QTS
0.80
xmax
3.4 mm
SPL1W
83 dB
Bl/√RE
1.39
Pmax
50 W