SB Acoustics SB65WBAC25-4

Full-range

2.5″ / 64 mm
Nominal diameter
115 Hz
Resonance
0.68
Q factor
81 dB
Sensitivity
± 2.65 mm
Linear excursion
40 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

Thiele & Small parameters

Resonance frequency (free air)
fS
115
Hz
Mechanical quality factor
QMS
6.00
Electrical quality factor
QES
0.77
Total quality factor
QTS
0.68

Large signal parameters

Maximum linear excursion
xmax
2.65
mm
Air volume displaced at xmax
VD
5.3
cm³
Power handling
P
20
W
Program power
Pmax
40
W

Voice Coil

Nominal impedance
Z
4
Ω
DC resistance
RE
3.6
Ω
Inductance (1kHz)
LE
0.15
mH
VC Diameter
25
mm
Winding height
HVC
8.3
mm

Magnet

Flux density
B
1.02
T
Force factor
Bl
2.9
N/A
Motor constant
Bl/√RE
1.53
N/√W
Air gap height
HAG
3
mm
Weight
0.02
kg

Diaphragm

Effective diameter
50
mm
Effective area
SD
20
cm²
Moving mass
MMS
2.5
g
Moving mass (without air load)
MMD
2.4
g

Suspensions

Stiffness
KMS
1.3
N/mm
Compliance
CMS
770
µm/N
Equivalent volume to the compliance
VAS
0.43
L
Mechanical resistance
RMS
0.3
N·s/m

Dimensions

Nominal diameter
2.5
64
mm
Net weight
0.14
kg
SB Acoustics SB65WBAC25-4 SPL & Impedance
SB Acoustics SB65WBAC25-4 Dimensions

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