Dayton Audio Reference RS125-4
Woofer
5″ / 126 mm
Nominal diameter
57 Hz
Resonance
0.37
Q factor
85 dB
Sensitivity
± 4 mm
Linear excursion
60 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
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
85.1
dB
Frequency response
65 - 5400
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
57.2
Hz
Mechanical quality factor
QMS
2.04
Electrical quality factor
QES
0.45
Total quality factor
QTS
0.37
Large signal parameters
Maximum linear excursion
xmax
4.0
mm
Air volume displaced at xmax
VD
21
cm³
Power handling
P
30
W
Program power
Pmax
60
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
2.9
Ω
Inductance (1kHz)
LE
0.28
mH
VC Diameter
25
mm
Magnet
Force factor
Bl
3.63
N/A
Motor constant
Bl/√RE
2.13
N/√W
Diaphragm
Effective diameter
82
mm
Effective area
SD
53
cm²
Moving mass
MMS
5.7
g
Moving mass (without air load)
MMD
5.4
g
Material
Black Anodized Aluminum
Suspensions
Stiffness
KMS
0.74
N/mm
Compliance
CMS
1350
µm/N
Equivalent volume to the compliance
VAS
5.29
L
Mechanical resistance
RMS
1.0
N·s/m
Dimensions
Nominal diameter
5
″
126
mm
Overall diameter
126
mm
Baffle cutout diameter
94
mm
Overall depth
54
mm
Volume occupied by the driver (estimated)
0.2
L
Frame material
Cast Aluminium
Similar woofers to Dayton Audio RS125-4
4.5″
fS
56 Hz
SD
54 cm²
56 - 3000 Hz
QTS
0.36
xmax
4.0 mm
SPL1W
85 dB
Bl/√RE
2.52
Pmax
100 W
5″Woofer
fS
56 Hz
SD
83 cm²
50 - 1000 Hz
QTS
0.40
xmax
7.0 mm
SPL1W
85 dB
Bl/√RE
3.7
Pmax
160 W
4″Subwoofer
fS
55 Hz
SD
57 cm²
55 - 3000 Hz
QTS
0.35
xmax
3.5 mm
SPL1W
85 dB
Bl/√RE
2.43
Pmax
56 W