Focal FLAX EVO Sub P 20 FE
Subwoofer
8″ / 200 mm
Nominal diameter
39 Hz
Resonance
0.56
Q factor
83 dB
Sensitivity
± 10 mm
Linear excursion
500 W
Program Power
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Sensitivity (1W, 1m, infinite baffle)
SPL1W
82.8
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
38.5
Hz
Mechanical quality factor
QMS
5.50
Electrical quality factor
QES
0.61
Total quality factor
QTS
0.56
Large signal parameters
Maximum linear excursion
xmax
10.0
mm
Air volume displaced at xmax
VD
216
cm³
Power handling
P
250
W
Program power
Pmax
500
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.4
Ω
Inductance (1kHz)
LE
1.7
mH
VC Diameter
38
mm
Winding height
HVC
28
mm
Winding material
Copper
Former material
Glass Fiber
Magnet
Flux density
B
0.75
T
Force factor
Bl
11.5
N/A
Motor constant
Bl/√RE
6.24
N/√W
Air gap height
HAG
8
mm
Diameter
120
mm
Height
32
mm
Diaphragm
Effective diameter
166
mm
Effective area
SD
216
cm²
Moving mass
MMS
95
g
Moving mass (without air load)
MMD
92.6
g
Material
Flax
Suspensions
Stiffness
KMS
5.56
N/mm
Compliance
CMS
180
µm/N
Equivalent volume to the compliance
VAS
12
L
Mechanical resistance
RMS
4.18
N·s/m
Surround material
Rubber
Dimensions
Nominal diameter
8
″
200
mm
Overall diameter
214
mm
Baffle cutout diameter
187
mm
Mounting depth
117
mm
Volume occupied by the driver (estimated)
1.4
L
Net weight
3.2
kg
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Skar Audio SDR-10 D42 x 4 Ω
10″Subwoofer
fS
39 Hz
SD
299 cm²
39 - 300 Hz
QTS
0.61
xmax
13.5 mm
SPL1W
82 dB
Bl/√RE
8.62
Pmax
1200 W