Dayton Audio DMA70-4

4Ω
8Ω

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
Dayton Audio DMA70-4 Full-rangeDayton Audio DMA70-4 Full-range
Impedance
Excursion
Velocity
SPL
Phase
Group delay
Step response
Tone Burst
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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Parts Express
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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
Impedance
SPL
Dayton Audio DMA70-4 Impedance
Dayton Audio DMA70-4 SPL
Dayton Audio DMA70-4 Dimensions
DatasheetDatasheet

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Similar speaker drivers to Dayton Audio DMA70-4

Dayton Audio DMA70-8 Full-range
Dayton Audio  DMA70-88 Ω
2.5″Full-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