SB Acoustics SB15SFCR39-8
Mid Bass
5x8″/ 127x203 mm
Nominal size
32 Hz
Resonance
0.42
Q factor
87 dB
Sensitivity
± 5 mm
Linear excursion
160 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
86.8
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
32.0
Hz
Mechanical quality factor
QMS
7.11
Electrical quality factor
QES
0.45
Total quality factor
QTS
0.42
Large signal parameters
Maximum linear excursion
xmax
5.0
mm
Air volume displaced at xmax
VD
89
cm³
Power handling
P
80
W
Program power
Pmax
160
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.2
Ω
Inductance (1kHz)
LE
1.3
mH
VC Diameter
39
mm
Winding height
HVC
16
mm
Magnet
Flux density
B
0.94
T
Force factor
Bl
8.0
N/A
Motor constant
Bl/√RE
3.21
N/√W
Air gap height
HAG
6
mm
Weight
0.54
kg
Diaphragm
Effective diameter
151
mm
Effective area
SD
178
cm²
Moving mass
MMS
23
g
Moving mass (without air load)
MMD
22.1
g
Suspensions
Stiffness
KMS
0.93
N/mm
Compliance
CMS
1080
µm/N
Equivalent volume to the compliance
VAS
48.3
L
Mechanical resistance
RMS
0.65
N·s/m
Dimensions
Nominal size
5 x 8
″
127 x 203
mm
Volume occupied by the driver (estimated)
0.67
L
Net weight
1.65
kg
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fS
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SD
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30 - 7500 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
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fS
33 Hz
SD
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fS
35 Hz
SD
219 cm²
50 - 3000 Hz
QTS
0.49
xmax
7.0 mm
SPL1W
87 dB
Bl/√RE
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