Dayton Audio DMA70-4

Full-range

2.5″ / 64 mm
Nominal diameter
113 Hz
Resonance
0.44
Q factor
83 dB
Sensitivity
± 2 mm
Linear excursion
40 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

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Specifications

Sensitivity (1W, 1m, infinite baffle)
SPL1W
83.0
dB
Frequency response
110 - 20000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
113
Hz
Mechanical quality factor
QMS
2.04
Electrical quality factor
QES
0.56
Total quality factor
QTS
0.44

Large signal parameters

Maximum linear excursion
xmax
2.0
mm
Air volume displaced at xmax
VD
4.6
cm³
Power handling
P
20
W
Program power
Pmax
40
W

Voice Coil

Nominal impedance
Z
4
Ω
DC resistance
RE
4.0
Ω
Inductance (1kHz)
LE
0.3
mH
VC Diameter
25
mm

Magnet

Force factor
Bl
3.7
N/A
Motor constant
Bl/√RE
1.85
N/√W

Diaphragm

Effective diameter
54
mm
Effective area
SD
23
cm²
Moving mass
MMS
2.8
g
Moving mass (without air load)
MMD
2.7
g

Suspensions

Stiffness
KMS
1.41
N/mm
Compliance
CMS
710
µm/N
Equivalent volume to the compliance
VAS
0.566
L
Mechanical resistance
RMS
0.97
N·s/m

Dimensions

Nominal diameter
2.5
64
mm
Dayton Audio DMA70-4 Impedance
Dayton Audio DMA70-4 SPL
Dayton Audio DMA70-4 Dimensions

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Similar speaker drivers to Dayton Audio DMA70-4

Dayton Audio DMA70-8 Full-range
2.5Full-range
fS
114 Hz
SD
23 cm²
110 - 20000 Hz
QTS
0.50
xmax
2.0 mm
SPL1W
83 dB
Bl/√RE
1.72
Pmax
40 W