EASTECH 04A18EHC18225F

Full-range

1.75″ / 44 mm
Nominal diameter
172 Hz
Resonance
0.46
Q factor
81 dB
Sensitivity
± 2 mm
Linear excursion
4 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
Discard
Apply
Sensitivity (1W, 1m, infinite baffle)
SPL1W
80.5
dB

Thiele & Small parameters

Resonance frequency (free air)
fS
172
Hz
Mechanical quality factor
QMS
7.74
Electrical quality factor
QES
0.49
Total quality factor
QTS
0.46

Large signal parameters

Maximum linear excursion
xmax
2.0
mm
Air volume displaced at xmax
VD
1.7
cm³
Power handling
P
2
W
Program power
Pmax
4
W

Voice Coil

Nominal impedance
Z
4
Ω
DC resistance
RE
3.3
Ω
Inductance (1kHz)
LE
0.12
mH
VC Diameter
19
mm
Winding height
HVC
7
mm
Winding material
PESVW
Former material
Kapton

Magnet

Force factor
Bl
3.12
N/A
Motor constant
Bl/√RE
1.71
N/√W
Air gap height
HAG
3
mm
Material
Neodymium

Diaphragm

Effective diameter
33
mm
Effective area
SD
8.6
cm²
Moving mass
MMS
1.3
g
Moving mass (without air load)
MMD
1.3
g
Material
Paper

Suspensions

Stiffness
KMS
1.55
N/mm
Compliance
CMS
647
µm/N
Equivalent volume to the compliance
VAS
0.0678
L
Mechanical resistance
RMS
0.185
N·s/m
Surround material
IIR

Dimensions

Nominal diameter
1.75
44
mm
Net weight
0.069
kg
Frame material
Steel
EASTECH 04A18EHC18225F SPL & Impedance
EASTECH 04A18EHC18225F Dimensions

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