SB Acoustics SB23NACS45-4

4Ω
8Ω

Woofer

8″ / 203 mm
Nominal diameter
23 Hz
Resonance
0.33
Q factor
87 dB
Sensitivity
± 6.5 mm
Linear excursion
120 W
Program Power
SB Acoustics SB23NACS45-4 WooferSB Acoustics SB23NACS45-4 Woofer
Impedance
Excursion
Velocity
SPL
Phase
Group delay
Step response
Tone Burst
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
87.1
dB

Thiele & Small parameters

Resonance frequency (free air)
fS
23.0
Hz
Mechanical quality factor
QMS
5.40
Electrical quality factor
QES
0.35
Total quality factor
QTS
0.33

Large signal parameters

Maximum linear excursion
xmax
6.5
mm
Air volume displaced at xmax
VD
140
cm³
Power handling
P
60
W
Program power
Pmax
120
W

Voice Coil

Nominal impedance
Z
4
Ω
DC resistance
RE
3.3
Ω
Inductance (1kHz)
LE
0.27
mH
VC Diameter
46
mm
Winding height
HVC
19
mm

Magnet

Flux density
B
0.86
T
Force factor
Bl
6.7
N/A
Motor constant
Bl/√RE
3.69
N/√W
Air gap height
HAG
6
mm
Weight
0.8
kg

Diaphragm

Effective diameter
166
mm
Effective area
SD
216
cm²
Moving mass
MMS
32
g
Moving mass (without air load)
MMD
29.7
g

Suspensions

Stiffness
KMS
0.69
N/mm
Compliance
CMS
1450
µm/N
Equivalent volume to the compliance
VAS
95
L
Mechanical resistance
RMS
0.9
N·s/m

Dimensions

Nominal diameter
8
″
203
mm
Volume occupied by the driver (estimated)
1.1
L
Net weight
2.7
kg
SPL & Impedance
SB Acoustics SB23NACS45-4 SPL & Impedance
SB Acoustics SB23NACS45-4 Dimensions
DatasheetDatasheet

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