8″ / 203 mm
Nominal diameter
65 Hz
Resonance
0.7
Q factor
85 dB
Sensitivity
± 12.5 mm
Linear excursion
800 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
84.6
dB
Frequency response
50 - 500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
65.0
Hz
Mechanical quality factor
QMS
5.30
Electrical quality factor
QES
0.82
Total quality factor
QTS
0.70
Large signal parameters
Maximum linear excursion
xmax
12.5
mm
Air volume displaced at xmax
VD
338
cm³
Power handling
P
400
W
Program power
Pmax
800
W
Voice Coil
Nominal impedance
Z
2 x 4
Ω
DC resistance (in series)
RE
6.8
Ω
Inductance (1kHz, in series, estimated)
LE
1.75
mH
VC Diameter
51
mm
Magnet
Force factor (in series)
Bl
20.0
N/A
Motor constant
Bl/√RE
7.67
N/√W
Diameter
160
mm
Diaphragm
Effective diameter
186
mm
Effective area
SD
270
cm²
Moving mass
MMS
119.9
g
Moving mass (without air load)
MMD
117
g
Suspensions
Stiffness
KMS
20.0
N/mm
Compliance
CMS
50
µm/N
Equivalent volume to the compliance
VAS
5.18
L
Mechanical resistance
RMS
9.24
N·s/m
Dimensions
Nominal diameter
8
″
203
mm
Baffle cutout diameter
188
mm
Mounting depth
145
mm
Volume occupied by the driver
2.8
L
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fS
63 Hz
SD
263 cm²
50 - 500 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
7.95
Pmax
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fS
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SD
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QTS
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xmax
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Bl/√RE
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