8″ / 203 mm
Nominal diameter
30 Hz
Resonance
0.28
Q factor
84 dB
Sensitivity
± 12.1 mm
Linear excursion
240 W
Program Power
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Available on (affiliate link)
Parts Express
$$$
Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
84.3
dB
Frequency response
30 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
30.0
Hz
Mechanical quality factor
QMS
3.69
Electrical quality factor
QES
0.31
Total quality factor
QTS
0.28
Large signal parameters
Maximum linear excursion
xmax
12.1
mm
Air volume displaced at xmax
VD
266
cm³
Power handling
P
120
W
Program power
Pmax
240
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.2
Ω
Inductance (1kHz)
LE
0.84
mH
VC Diameter
50
mm
Magnet
Force factor
Bl
13.66
N/A
Motor constant
Bl/√RE
7.64
N/√W
Air gap height
HAG
8
mm
Material
Ferrite
Diaphragm
Effective diameter
167
mm
Effective area
SD
220
cm²
Moving mass
MMS
94.3
g
Moving mass (without air load)
MMD
91.9
g
Material
Paper
Suspensions
Stiffness
KMS
3.43
N/mm
Compliance
CMS
291
µm/N
Equivalent volume to the compliance
VAS
20
L
Mechanical resistance
RMS
4.82
N·s/m
Surround material
Foam
Dimensions
Nominal diameter
8
″
203
mm
Volume occupied by the driver (estimated)
2.5
L
Net weight
5.8
kg
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Export this driver to a simulation software:
WinISD
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QSpeakers
SpeakerSim
MfbLabs
SpeakerbenchSimilar subwoofers to Tang Band W8-740P
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8″Subwoofer
fS
30 Hz
SD
220 cm²
30 - 800 Hz
QTS
0.32
xmax
12.0 mm
SPL1W
84 dB
Bl/√RE
7.79
Pmax
300 W
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Fi Car Audio BL10v3.1 D22 x 2 Ω
10″Subwoofer
fS
38 Hz
SD
310 cm²
QTS
0.27
xmax
20.0 mm
SPL1W
85 dB
Bl/√RE
13
Pmax
3500 W