Tang Band W4-1805S
Mid-range
4″ / 102 mm
Nominal diameter
80 Hz
Resonance
0.24
Q factor
91 dB
Sensitivity
± 0.45 mm
Linear excursion
70 W
Program Power
Discontinued
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
91.1
dB
Frequency response
80 - 8500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
80.0
Hz
Mechanical quality factor
QMS
1.29
Electrical quality factor
QES
0.29
Total quality factor
QTS
0.24
Large signal parameters
Maximum linear excursion
xmax
0.45
mm
Air volume displaced at xmax
VD
2.6
cm³
Power handling
P
35
W
Program power
Pmax
70
W
Voice Coil
Nominal impedance
Z
6
Ω
DC resistance
RE
5.6
Ω
Inductance (1kHz)
LE
0.01
mH
VC Diameter
39
mm
Magnet
Force factor
Bl
5.88
N/A
Motor constant
Bl/√RE
2.48
N/√W
Air gap height
HAG
6
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
Aluminum
Suspensions
Stiffness
KMS
0.82
N/mm
Compliance
CMS
1216
µm/N
Equivalent volume to the compliance
VAS
5.61
L
Mechanical resistance
RMS
1.55
N·s/m
Surround material
Foam Rubber
Dimensions
Nominal diameter
4
″
102
mm
Volume occupied by the driver (estimated)
0.14
L
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4″Coaxial
fS
65 Hz
SD
57 cm²
65 - 20000 Hz
QTS
0.26
xmax
4.5 mm
SPL1W
89 dB
Bl/√RE
2.56
Pmax
50 W
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3″Full-range
fS
75 Hz
SD
32 cm²
75 - 20000 Hz
QTS
0.28
xmax
4.2 mm
SPL1W
88 dB
Bl/√RE
1.69
Pmax
25 W