Tang Band W4-1879
Full-range
4″ / 102 mm
Nominal diameter
55 Hz
Resonance
0.43
Q factor
88 dB
Sensitivity
± 5 mm
Linear excursion
50 W
Program Power
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Available on (affiliate link)
Parts Express
$$$
Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
87.6
dB
Frequency response
55 - 20000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
55.0
Hz
Mechanical quality factor
QMS
2.68
Electrical quality factor
QES
0.51
Total quality factor
QTS
0.43
Large signal parameters
Maximum linear excursion
xmax
5.0
mm
Air volume displaced at xmax
VD
29
cm³
Power handling
P
25
W
Program power
Pmax
50
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.3
Ω
Inductance (1kHz)
LE
0.03
mH
VC Diameter
25
mm
Magnet
Force factor
Bl
4.19
N/A
Motor constant
Bl/√RE
1.67
N/√W
Air gap height
HAG
15
mm
Material
Neodymium
Diaphragm
Effective diameter
85
mm
Effective area
SD
57
cm²
Moving mass
MMS
4
g
Moving mass (without air load)
MMD
3.7
g
Material
Paper
Suspensions
Stiffness
KMS
0.51
N/mm
Compliance
CMS
1977
µm/N
Equivalent volume to the compliance
VAS
9.12
L
Mechanical resistance
RMS
0.52
N·s/m
Surround material
Foam Rubber
Dimensions
Nominal diameter
4
″
102
mm
Volume occupied by the driver (estimated)
0.72
L
Net weight
1.753
kg
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fS
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SD
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45 - 3000 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
2.42
Pmax
240 W
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fS
57 Hz
SD
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QTS
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fS
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SD
80 cm²
53 - 4000 Hz
QTS
0.36
xmax
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SPL1W
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Bl/√RE
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