Dayton Audio CE4278-8
Full-range
1.25x3″/ 42x78 mm
Nominal size
211 Hz
Resonance
1.26
Q factor
84 dB
Sensitivity
± 2.1 mm
Linear excursion
20 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
83.7
dB
Frequency response
150 - 17000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
211
Hz
Mechanical quality factor
QMS
6.20
Electrical quality factor
QES
1.58
Total quality factor
QTS
1.26
Large signal parameters
Maximum linear excursion
xmax
2.1
mm
Air volume displaced at xmax
VD
3.3
cm³
Power handling
P
10
W
Program power
Pmax
20
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
7.3
Ω
Inductance (1kHz)
LE
0.12
mH
VC Diameter
16
mm
Magnet
Force factor
Bl
2.88
N/A
Motor constant
Bl/√RE
1.07
N/√W
Diaphragm
Effective diameter
45
mm
Effective area
SD
16
cm²
Moving mass
MMS
1.4
g
Moving mass (without air load)
MMD
1.4
g
Suspensions
Stiffness
KMS
2.41
N/mm
Compliance
CMS
415
µm/N
Equivalent volume to the compliance
VAS
0.145
L
Mechanical resistance
RMS
0.3
N·s/m
Dimensions
Nominal size
1.25 x 3
″
42 x 78
mm
Overall size
42 x 78
mm
Baffle cutout diameter
62
mm
Overall depth
26
mm
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2.3″Full-range
fS
190 Hz
SD
13 cm²
120 - 20000 Hz
QTS
0.98
xmax
0.6 mm
SPL1W
82 dB
Bl/√RE
0.84
Pmax
12 W
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2″Full-range
fS
180 Hz
SD
15 cm²
150 - 20000 Hz
QTS
1.00
xmax
2.0 mm
SPL1W
82 dB
Bl/√RE
1.04
Pmax
30 W
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1.5″Full-range
fS
230 Hz
SD
7.8 cm²
200 - 20000 Hz
QTS
1.00
xmax
1.2 mm
SPL1W
82 dB
Bl/√RE
0.71
Pmax
10 W