8″ / 210 mm
Nominal diameter
71 Hz
Resonance
1.66
Q factor
92 dB
Sensitivity
± 4.87 mm
Linear excursion
450 W
Program Power
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Specifications
Sensitivity (1W, 1m, infinite baffle)
SPL1W
91.9
dB
Frequency response
70 - 7000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
70.8
Hz
Mechanical quality factor
QMS
24.67
Electrical quality factor
QES
1.78
Total quality factor
QTS
1.66
Large signal parameters
Maximum linear excursion
xmax
4.87
mm
Air volume displaced at xmax
VD
111
cm³
Power handling
P
225
W
Program power
Pmax
450
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.3
Ω
Inductance (1kHz)
LE
0.69
mH
VC Diameter
51
mm
Winding height
HVC
12.5
mm
Winding material
Copper Clad Aluminium
Former material
Kapton
Magnet
Force factor
Bl
5.56
N/A
Motor constant
Bl/√RE
2.22
N/√W
Air gap height
HAG
5.5
mm
Material
Ferrite
Diaphragm
Effective diameter
170
mm
Effective area
SD
227
cm²
Moving mass
MMS
19.7
g
Moving mass (without air load)
MMD
17.2
g
Suspensions
Stiffness
KMS
3.91
N/mm
Compliance
CMS
256
µm/N
Equivalent volume to the compliance
VAS
18.4
L
Mechanical resistance
RMS
0.36
N·s/m
Dimensions
Nominal diameter
8
″
210
mm
Overall diameter
210
mm
Baffle cutout diameter
182
mm
Overall depth
117
mm
Flange thickness
32
mm
Mounting depth
85
mm
Volume occupied by the driver (estimated)
0.59
L
Net weight
1.06
kg
Frame material
Stamped Steel
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fS
63 Hz
SD
391 cm²
75 - 6500 Hz
QTS
1.58
xmax
3.9 mm
SPL1W
93 dB
Bl/√RE
2.8
Pmax
450 W
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8″Woofer
fS
57 Hz
SD
210 cm²
45 - 6000 Hz
QTS
1.47
xmax
2.5 mm
SPL1W
89 dB
Bl/√RE
1.83
Pmax
130 W
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fS
64 Hz
SD
391 cm²
75 - 6500 Hz
QTS
1.47
xmax
3.9 mm
SPL1W
94 dB
Bl/√RE
2.81
Pmax
450 W