3″ / 76 mm
Nominal diameter
75 Hz
Resonance
0.28
Q factor
88 dB
Sensitivity
± 4.2 mm
Linear excursion
25 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
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
88.4
dB
Frequency response
75 - 20000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
75.0
Hz
Mechanical quality factor
QMS
1.67
Electrical quality factor
QES
0.34
Total quality factor
QTS
0.28
Large signal parameters
Maximum linear excursion
xmax
4.2
mm
Air volume displaced at xmax
VD
13
cm³
Power handling
P
12
W
Program power
Pmax
25
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.5
Ω
Inductance (1kHz)
LE
0.02
mH
VC Diameter
20
mm
Magnet
Force factor
Bl
4.3
N/A
Motor constant
Bl/√RE
1.69
N/√W
Air gap height
HAG
12
mm
Diaphragm
Effective diameter
64
mm
Effective area
SD
32
cm²
Moving mass
MMS
2
g
Moving mass (without air load)
MMD
1.9
g
Suspensions
Stiffness
KMS
0.47
N/mm
Compliance
CMS
2117
µm/N
Equivalent volume to the compliance
VAS
3.08
L
Mechanical resistance
RMS
0.56
N·s/m
Surround material
Foam Rubber
Dimensions
Nominal diameter
3
″
76
mm
Volume occupied by the driver (estimated)
0.31
L
Net weight
0.807
kg
Similar speaker drivers to Tang Band W3-1878
4″Mid-range
fS
75 Hz
SD
49 cm²
QTS
0.33
xmax
3.0 mm
SPL1W
86 dB
Bl/√RE
2.96
Pmax
70 W
4″Mid-range
fS
68 Hz
SD
50 cm²
QTS
0.31
xmax
3.0 mm
SPL1W
86 dB
Bl/√RE
3.03
Pmax
70 W
5″Coaxial
fS
82 Hz
SD
57 cm²
70 - 3800 Hz
QTS
0.32
xmax
2.8 mm
SPL1W
88 dB
Bl/√RE
2.84
Pmax
180 W