SB Acoustics SB12PFC25-4

Mid Bass

4″ / 102 mm
Nominal diameter
58 Hz
Resonance
0.43
Q factor
85 dB
Sensitivity
± 5 mm
Linear excursion
60 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
84.8
dB

Thiele & Small parameters

Resonance frequency (free air)
fS
58.0
Hz
Mechanical quality factor
QMS
3.40
Electrical quality factor
QES
0.49
Total quality factor
QTS
0.43

Large signal parameters

Maximum linear excursion
xmax
5.0
mm
Air volume displaced at xmax
VD
25
cm³
Power handling
P
30
W
Program power
Pmax
60
W

Voice Coil

Nominal impedance
Z
4
Ω
DC resistance
RE
3.1
Ω
Inductance (1kHz)
LE
0.26
mH
VC Diameter
25
mm
Winding height
HVC
15
mm

Magnet

Flux density
B
0.84
T
Force factor
Bl
3.5
N/A
Motor constant
Bl/√RE
1.99
N/√W
Air gap height
HAG
5
mm
Weight
0.32
kg

Diaphragm

Effective diameter
80
mm
Effective area
SD
50
cm²
Moving mass
MMS
5.3
g
Moving mass (without air load)
MMD
5
g

Suspensions

Stiffness
KMS
0.7
N/mm
Compliance
CMS
1420
µm/N
Equivalent volume to the compliance
VAS
5.2
L
Mechanical resistance
RMS
0.6
N·s/m

Dimensions

Nominal diameter
4
102
mm
Volume occupied by the driver (estimated)
0.27
L
Net weight
0.7
kg
SB Acoustics SB12PFC25-4 SPL & Impedance
SB Acoustics SB12PFC25-4 Dimensions

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