Dayton Audio ND64-4
4Ω
16ΩFull-range
2.5″ / 64 mm
Nominal diameter
103 Hz
Resonance
0.33
Q factor
82 dB
Sensitivity
± 1.9 mm
Linear excursion
30 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
81.8
dB
Frequency response
100 - 20000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
103
Hz
Mechanical quality factor
QMS
4.36
Electrical quality factor
QES
0.36
Total quality factor
QTS
0.33
Large signal parameters
Maximum linear excursion
xmax
1.9
mm
Air volume displaced at xmax
VD
3.0
cm³
Power handling
P
15
W
Program power
Pmax
30
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.7
Ω
Inductance (1kHz)
LE
0.37
mH
VC Diameter
19
mm
Winding material
CCA
Former material
Polyimide
Magnet
Force factor
Bl
4.13
N/A
Motor constant
Bl/√RE
2.15
N/√W
Material
Neodymium
Diaphragm
Effective diameter
45
mm
Effective area
SD
16
cm²
Moving mass
MMS
2.6
g
Moving mass (without air load)
MMD
2.5
g
Material
Black Anodized Aluminum
Suspensions
Stiffness
KMS
1.08
N/mm
Compliance
CMS
930
µm/N
Equivalent volume to the compliance
VAS
0.42
L
Mechanical resistance
RMS
0.38
N·s/m
Surround material
Rubber
Dimensions
Nominal diameter
2.5
″
64
mm
Overall diameter
64
mm
Baffle cutout diameter
53
mm
Overall depth
39
mm
Frame material
Stamped Steel
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2″Subwoofer
fS
90 Hz
SD
15 cm²
90 - 500 Hz
QTS
0.31
xmax
2.0 mm
SPL1W
82 dB
Bl/√RE
2.01
Pmax
40 W
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2″Woofer
fS
110 Hz
SD
13 cm²
110 - 10000 Hz
QTS
0.36
xmax
3.0 mm
SPL1W
80 dB
Bl/√RE
1.97
Pmax
30 W
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1″Full-range
fS
120 Hz
SD
9.0 cm²
120 - 20000 Hz
QTS
0.33
xmax
1.3 mm
SPL1W
81 dB
Bl/√RE
1.4
Pmax
8 W