4″ / 119 mm
Nominal diameter
62 Hz
Resonance
0.35
Q factor
86 dB
Sensitivity
± 4.5 mm
Linear excursion
300 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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Parts Express
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
86.3
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
62.0
Hz
Mechanical quality factor
QMS
2.36
Electrical quality factor
QES
0.41
Total quality factor
QTS
0.35
Large signal parameters
Maximum linear excursion
xmax
4.5
mm
Air volume displaced at xmax
VD
26
cm³
Power handling
P
150
W
Program power
Pmax
300
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.3
Ω
Inductance (1kHz)
LE
0.44
mH
VC Diameter
54
mm
Winding height
HVC
14
mm
Winding material
Hexatech™ Aluminum
Magnet
Flux density
B
0.94
T
Force factor
Bl
6.1
N/A
Motor constant
Bl/√RE
2.43
N/√W
Air gap height
HAG
5
mm
Diaphragm
Effective diameter
85
mm
Effective area
SD
57
cm²
Moving mass
MMS
6.2
g
Moving mass (without air load)
MMD
5.8
g
Material
Damped polymer composite
Suspensions
Stiffness
KMS
0.96
N/mm
Compliance
CMS
1046
µm/N
Equivalent volume to the compliance
VAS
4.7
L
Mechanical resistance
RMS
1.02
N·s/m
Dimensions
Nominal diameter
4
″
119
mm
Overall diameter
119
mm
Baffle cutout diameter
94
mm
Overall depth
56
mm
Flange thickness
5
mm
Mounting depth
51
mm
Volume occupied by the driver (estimated)
0.16
L
Net weight
0.518
kg
Similar woofers to Morel EW 428
4.5″
fS
64 Hz
SD
55 cm²
64 - 4000 Hz
QTS
0.36
xmax
3.0 mm
SPL1W
86 dB
Bl/√RE
2.57
Pmax
100 W
4.75″Mid-range
fS
70 Hz
SD
54 cm²
70 - 4000 Hz
QTS
0.37
SPL1W
86 dB
Bl/√RE
2.52
Pmax
100 W
4″Mid-range
fS
61 Hz
SD
52 cm²
61 - 7000 Hz
QTS
0.37
xmax
2.5 mm
SPL1W
86 dB
Bl/√RE
2.18
Pmax
60 W