7″ / 181 mm
Nominal diameter
38 Hz
Resonance
0.46
Q factor
85 dB
Sensitivity
± 6 mm
Linear excursion
120 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
84.7
dB
Frequency response
39 - 3600
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
38.4
Hz
Mechanical quality factor
QMS
2.13
Electrical quality factor
QES
0.59
Total quality factor
QTS
0.46
Large signal parameters
Maximum linear excursion
xmax
6.0
mm
Air volume displaced at xmax
VD
75
cm³
Power handling
P
60
W
Program power
Pmax
120
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.1
Ω
Inductance (1kHz)
LE
0.45
mH
VC Diameter
38
mm
Winding material
Copper
Former material
Aluminum
Magnet
Force factor
Bl
4.71
N/A
Motor constant
Bl/√RE
2.68
N/√W
Material
Ferrite
Diaphragm
Effective diameter
126
mm
Effective area
SD
125
cm²
Moving mass
MMS
17.8
g
Moving mass (without air load)
MMD
16.7
g
Material
Black Anodized Aluminum
Suspensions
Stiffness
KMS
1.03
N/mm
Compliance
CMS
970
µm/N
Equivalent volume to the compliance
VAS
21.2
L
Mechanical resistance
RMS
2.02
N·s/m
Surround material
Rubber
Dimensions
Nominal diameter
7
″
181
mm
Overall diameter
181
mm
Baffle cutout diameter
146
mm
Overall depth
82
mm
Volume occupied by the driver (estimated)
0.55
L
Frame material
Cast Aluminium
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Export this driver to a simulation software:
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QSpeakers
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MfbLabs
SpeakerbenchSimilar woofers to Dayton Audio RS180-4
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6.5″Woofer
fS
37 Hz
SD
104 cm²
45 - 2000 Hz
QTS
0.45
xmax
6.0 mm
SPL1W
84 dB
Bl/√RE
2.49
Pmax
250 W
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8″Woofer
fS
34 Hz
SD
136 cm²
20 - 2000 Hz
QTS
0.41
xmax
7.0 mm
SPL1W
85 dB
Bl/√RE
3.33
Pmax
360 W