Dayton Audio ND91-4
4Ω
8ΩFull-range
3.5″ / 104 mm
Nominal diameter
74 Hz
Resonance
0.41
Q factor
82 dB
Sensitivity
± 4.6 mm
Linear excursion
60 W
Program Power
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Parts Express
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
82.4
dB
Frequency response
65 - 17000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
74.0
Hz
Mechanical quality factor
QMS
4.24
Electrical quality factor
QES
0.45
Total quality factor
QTS
0.41
Large signal parameters
Maximum linear excursion
xmax
4.6
mm
Air volume displaced at xmax
VD
14
cm³
Power handling
P
30
W
Program power
Pmax
60
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
4.3
Ω
Inductance (1kHz)
LE
0.83
mH
VC Diameter
25
mm
Winding material
Aluminum
Former material
Kapton® / Polyimide
Magnet
Force factor
Bl
4.59
N/A
Motor constant
Bl/√RE
2.21
N/√W
Material
Ferrite
Diaphragm
Effective diameter
62
mm
Effective area
SD
30
cm²
Moving mass
MMS
4.8
g
Moving mass (without air load)
MMD
4.7
g
Material
Aluminum
Suspensions
Stiffness
KMS
1.04
N/mm
Compliance
CMS
960
µm/N
Equivalent volume to the compliance
VAS
1.4
L
Mechanical resistance
RMS
0.53
N·s/m
Surround material
Rubber
Dimensions
Nominal diameter
3.5
″
104
mm
Overall diameter
104
mm
Baffle cutout diameter
85
mm
Overall depth
63
mm
Volume occupied by the driver (estimated)
0.19
L
Frame material
Steel
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SpeakerbenchSimilar speaker drivers to Dayton Audio ND91-4
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3.5″Full-range
fS
71 Hz
SD
30 cm²
70 - 17000 Hz
QTS
0.47
xmax
5.1 mm
SPL1W
82 dB
Bl/√RE
2.02
Pmax
60 W
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3″Full-range
fS
70 Hz
SD
24 cm²
100 - 20000 Hz
QTS
0.37
xmax
4.6 mm
SPL1W
82 dB
Bl/√RE
1.76
Pmax
12 W
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3.5″Coaxial
fS
79 Hz
SD
31 cm²
70 - 20000 Hz
QTS
0.46
xmax
6.5 mm
SPL1W
82 dB
Bl/√RE
2.24
Pmax
50 W