SB Acoustics SB13PFC25-4-COAX
Coaxial
5″ / 127 mm
Nominal diameter
43 Hz
Resonance
0.27
Q factor
87 dB
Sensitivity
± 4.65 mm
Linear excursion
80 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
87.3
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
43.0
Hz
Mechanical quality factor
QMS
2.26
Electrical quality factor
QES
0.30
Total quality factor
QTS
0.27
Large signal parameters
Maximum linear excursion
xmax
4.65
mm
Air volume displaced at xmax
VD
38
cm³
Power handling
P
40
W
Program power
Pmax
80
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.2
Ω
Inductance (1kHz)
LE
0.3
mH
VC Diameter
25
mm
Winding height
HVC
14.3
mm
Magnet
Flux density
B
1.1
T
Force factor
Bl
5.1
N/A
Motor constant
Bl/√RE
2.85
N/√W
Air gap height
HAG
5
mm
Weight
0.36
kg
Diaphragm
Effective diameter
102
mm
Effective area
SD
82
cm²
Moving mass
MMS
9.1
g
Moving mass (without air load)
MMD
8.6
g
Suspensions
Stiffness
KMS
0.66
N/mm
Compliance
CMS
1510
µm/N
Equivalent volume to the compliance
VAS
14.4
L
Mechanical resistance
RMS
1.1
N·s/m
Dimensions
Nominal diameter
5
″
127
mm
Volume occupied by the driver (estimated)
0.37
L
Net weight
0.93
kg
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