Focal K2 POWER SUB 25 KXS

Subwoofer

10″ / 268 mm
Nominal diameter
35 Hz
Resonance
0.8
Q factor
81 dB
Sensitivity
700 W
Program Power
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
Sensitivity (1w, 1m, infinite baffle)
SPL1W
81.4
dB
Frequency response
25 - 500
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
35.0
Hz
Mechanical quality factor
QMS
5.00
Electrical quality factor
QES
0.97
Total quality factor
QTS
0.80

Large signal parameters

Power handling
P
350
W
Program power
Pmax
700
W

Voice Coil

Nominal impedance
Z
4
Ω
DC resistance
RE
3.2
Ω
Inductance (1kHz, estimated)
LE
1.06
mH
VC Diameter
45
mm

Magnet

Force factor
Bl
11.5
N/A
Motor constant
Bl/√RE
6.43
N/√W

Diaphragm

Effective diameter
204
mm
Effective area
SD
327
cm²
Moving mass
MMS
180
g
Moving mass (without air load)
MMD
175.5
g
Material
K2 Sandwich

Suspensions

Stiffness
KMS
8.33
N/mm
Compliance
CMS
120
µm/N
Equivalent volume to the compliance
VAS
18
L
Mechanical resistance
RMS
7.92
N·s/m
Surround material
Butyl

Dimensions

Nominal diameter
10
268
mm
Overall diameter
268
mm
Baffle cutout diameter
235
mm
Mounting depth
95
mm
Volume occupied by the driver (estimated)
2.0
L
Net weight
4.7
kg
Focal SUB 25 KXS Dimensions

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