4.5″ / 114 mm
Nominal diameter
65 Hz
Resonance
0.29
Q factor
88 dB
Sensitivity
± 2.8 mm
Linear excursion
60 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
Sensitivity (1w, 1m, infinite baffle)
SPL1W
88.2
dB
Frequency response
65 - 40000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
65.0
Hz
Mechanical quality factor
QMS
3.68
Electrical quality factor
QES
0.31
Total quality factor
QTS
0.29
Large signal parameters
Maximum linear excursion
xmax
2.8
mm
Air volume displaced at xmax
VD
19
cm³
Power handling
P
30
W
Program power
Pmax
60
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.6
Ω
Inductance (1kHz)
LE
0.09
mH
VC Diameter
32
mm
Magnet
Force factor
Bl
6.2
N/A
Motor constant
Bl/√RE
3.27
N/√W
Air gap height
HAG
12
mm
Diaphragm
Effective diameter
94
mm
Effective area
SD
69
cm²
Moving mass
MMS
8.1
g
Moving mass (without air load)
MMD
7.7
g
Suspensions
Stiffness
KMS
1.29
N/mm
Compliance
CMS
773
µm/N
Equivalent volume to the compliance
VAS
4.96
L
Mechanical resistance
RMS
0.9
N·s/m
Dimensions
Nominal diameter
4.5
″
114
mm
Volume occupied by the driver (estimated)
0.48
L
Net weight
1.196
kg
Similar speaker drivers to Tang Band W4-2315
4″Mid-range
fS
64 Hz
SD
58 cm²
QTS
0.24
xmax
3.5 mm
SPL1W
89 dB
Bl/√RE
2.9
Pmax
150 W
4″Woofer
fS
70 Hz
SD
50 cm²
QTS
0.31
xmax
4.3 mm
SPL1W
88 dB
Bl/√RE
2.29
Pmax
150 W
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