Fostex P1000K
Full-range
4″ / 100 mm
Nominal diameter
82 Hz
Resonance
0.53
Q factor
89 dB
Sensitivity
± 0.35 mm
Linear excursion
36 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
88.7
dB
Frequency response
82 - 16000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
82.0
Hz
Mechanical quality factor
QMS
4.00
Electrical quality factor
QES
0.60
Total quality factor
QTS
0.53
Large signal parameters
Maximum linear excursion
xmax
0.35
mm
Air volume displaced at xmax
VD
1.8
cm³
Power handling
P
12
W
Program power
Pmax
36
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.8
Ω
Inductance (1kHz)
LE
0.04
mH
VC Diameter
20
mm
Magnet
Force factor
Bl
4.29
N/A
Motor constant
Bl/√RE
1.65
N/√W
Weight
0.12
kg
Diaphragm
Effective diameter
80
mm
Effective area
SD
50
cm²
Moving mass
MMS
3.1
g
Moving mass (without air load)
MMD
2.8
g
Suspensions
Stiffness
KMS
0.81
N/mm
Compliance
CMS
1241
µm/N
Equivalent volume to the compliance
VAS
4.84
L
Mechanical resistance
RMS
0.4
N·s/m
Dimensions
Nominal diameter
4
″
100
mm
Overall diameter
107
mm
Baffle cutout diameter
94
mm
Overall depth
48
mm
Volume occupied by the driver (estimated)
0.12
L
Net weight
0.405
kg
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5″Full-range
fS
83 Hz
SD
74 cm²
90 - 15000 Hz
QTS
0.51
xmax
2.0 mm
SPL1W
88 dB
Bl/√RE
2.42
Pmax
100 W
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5″Woofer
fS
85 Hz
SD
90 cm²
20 - 5000 Hz
QTS
0.57
xmax
3.5 mm
SPL1W
88 dB
Bl/√RE
2.6
Pmax
60 W