6.5″ / 165 mm
Nominal diameter
39 Hz
Resonance
0.27
Q factor
90 dB
Sensitivity
± 6.5 mm
Linear excursion
260 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
89.6
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
39.0
Hz
Mechanical quality factor
QMS
4.90
Electrical quality factor
QES
0.28
Total quality factor
QTS
0.27
Large signal parameters
Maximum linear excursion
xmax
6.5
mm
Air volume displaced at xmax
VD
92
cm³
Power handling
P
130
W
Program power
Pmax
260
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.4
Ω
Inductance (1kHz)
LE
1.4
mH
VC Diameter
38
mm
Winding height
HVC
17
mm
Former material
Kapton
Magnet
Force factor
Bl
8.9
N/A
Motor constant
Bl/√RE
3.83
N/√W
Air gap height
HAG
8
mm
Diaphragm
Effective diameter
134
mm
Effective area
SD
141
cm²
Moving mass
MMS
16.2
g
Moving mass (without air load)
MMD
14.9
g
Material
Doped cellulose fiber
Suspensions
Stiffness
KMS
1.01
N/mm
Compliance
CMS
994
µm/N
Equivalent volume to the compliance
VAS
27
L
Mechanical resistance
RMS
0.81
N·s/m
Surround material
Rubber
Spider material
Cotton fabric
Dimensions
Nominal diameter
6.5
″
165
mm
Overall diameter
174
mm
Baffle cutout diameter
146
mm
Overall depth
83
mm
Flange thickness
6
mm
Mounting depth
77
mm
Volume occupied by the driver (estimated)
0.73
L
Net weight
2.5
kg
Frame material
Aluminium
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fS
39 Hz
SD
201 cm²
39 - 3000 Hz
QTS
0.30
xmax
6.0 mm
SPL1W
89 dB
Bl/√RE
5.42
Pmax
200 W
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8″Woofer
fS
42 Hz
SD
226 cm²
50 - 6300 Hz
QTS
0.30
xmax
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SPL1W
89 dB
Bl/√RE
6.04
Pmax
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fS
40 Hz
SD
194 cm²
55 - 3000 Hz
QTS
0.25
xmax
8.0 mm
SPL1W
91 dB
Bl/√RE
5.29
Pmax
300 W