Dayton Audio Signature SIG225-4
Woofer
8″ / 225 mm
Nominal diameter
40 Hz
Resonance
0.43
Q factor
88 dB
Sensitivity
± 6 mm
Linear excursion
200 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
88.0
dB
Frequency response
39 - 4500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
40.0
Hz
Mechanical quality factor
QMS
8.87
Electrical quality factor
QES
0.45
Total quality factor
QTS
0.43
Large signal parameters
Maximum linear excursion
xmax
6.0
mm
Air volume displaced at xmax
VD
133
cm³
Power handling
P
100
W
Program power
Pmax
200
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.9
Ω
Inductance (1kHz)
LE
0.49
mH
VC Diameter
51
mm
Winding material
Copper
Former material
Glass fiber
Magnet
Force factor
Bl
9.0
N/A
Motor constant
Bl/√RE
4.56
N/√W
Material
Ferrite
Diaphragm
Effective diameter
168
mm
Effective area
SD
221
cm²
Moving mass
MMS
36.9
g
Moving mass (without air load)
MMD
34.4
g
Material
Aluminum
Suspensions
Stiffness
KMS
2.33
N/mm
Compliance
CMS
430
µm/N
Equivalent volume to the compliance
VAS
29.7
L
Mechanical resistance
RMS
1.05
N·s/m
Surround material
Rubber
Dimensions
Nominal diameter
8
″
225
mm
Overall diameter
225
mm
Baffle cutout diameter
190
mm
Overall depth
102
mm
Volume occupied by the driver (estimated)
0.99
L
Frame material
Cast Aluminium
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SpeakerbenchSimilar woofers to Dayton Audio SIG225-4
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8″Mid Bass
fS
41 Hz
SD
201 cm²
40 - 2000 Hz
QTS
0.39
xmax
4.5 mm
SPL1W
89 dB
Bl/√RE
4.13
Pmax
300 W
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8″Woofer
fS
37 Hz
SD
227 cm²
30 - 1000 Hz
QTS
0.37
xmax
10.3 mm
SPL1W
88 dB
Bl/√RE
4.86
Pmax
250 W
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