Focal FLAX EVO Sub P 25 FE
Subwoofer
10″ / 250 mm
Nominal diameter
31 Hz
Resonance
0.45
Q factor
85 dB
Sensitivity
± 14 mm
Linear excursion
600 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
84.9
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
31.0
Hz
Mechanical quality factor
QMS
4.50
Electrical quality factor
QES
0.51
Total quality factor
QTS
0.45
Large signal parameters
Maximum linear excursion
xmax
14.0
mm
Air volume displaced at xmax
VD
486
cm³
Power handling
P
300
W
Program power
Pmax
600
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.7
Ω
Inductance (1kHz)
LE
2.7
mH
VC Diameter
50
mm
Winding height
HVC
35
mm
Winding material
Copper
Former material
Glass Fiber
Magnet
Flux density
B
0.75
T
Force factor
Bl
14.8
N/A
Motor constant
Bl/√RE
7.69
N/√W
Air gap height
HAG
8
mm
Diameter
145
mm
Height
40
mm
Diaphragm
Effective diameter
210
mm
Effective area
SD
347
cm²
Moving mass
MMS
145
g
Moving mass (without air load)
MMD
140.3
g
Material
Flax
Suspensions
Stiffness
KMS
5.88
N/mm
Compliance
CMS
170
µm/N
Equivalent volume to the compliance
VAS
29
L
Mechanical resistance
RMS
6.28
N·s/m
Surround material
Rubber
Dimensions
Nominal diameter
10
″
250
mm
Overall diameter
260
mm
Baffle cutout diameter
234
mm
Mounting depth
141
mm
Volume occupied by the driver (estimated)
2.4
L
Net weight
5.4
kg
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