6.5″ / 165 mm
Nominal diameter
38 Hz
Resonance
0.4
Q factor
83 dB
Sensitivity
± 13 mm
Linear excursion
100 W
Program Power
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
83.4
dB
Frequency response
38 - 800
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
38.0
Hz
Mechanical quality factor
QMS
2.65
Electrical quality factor
QES
0.47
Total quality factor
QTS
0.40
Large signal parameters
Maximum linear excursion
xmax
13.0
mm
Air volume displaced at xmax
VD
182
cm³
Power handling
P
50
W
Program power
Pmax
100
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.6
Ω
Inductance (1kHz)
LE
0.34
mH
VC Diameter
39
mm
Magnet
Force factor
Bl
8.67
N/A
Motor constant
Bl/√RE
4.57
N/√W
Air gap height
HAG
4
mm
Diaphragm
Effective diameter
134
mm
Effective area
SD
140
cm²
Moving mass
MMS
39.9
g
Moving mass (without air load)
MMD
38.7
g
Suspensions
Stiffness
KMS
2.36
N/mm
Compliance
CMS
423
µm/N
Equivalent volume to the compliance
VAS
11.8
L
Mechanical resistance
RMS
3.6
N·s/m
Dimensions
Nominal diameter
6.5
″
165
mm
Volume occupied by the driver (estimated)
0.86
L
Net weight
2.08
kg
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fS
42 Hz
SD
211 cm²
QTS
0.41
xmax
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SPL1W
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Bl/√RE
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Pmax
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6.5″Woofer
fS
39 Hz
SD
94 cm²
45 - 2500 Hz
QTS
0.35
xmax
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Bl/√RE
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Pmax
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fS
30 Hz
SD
220 cm²
30 - 800 Hz
QTS
0.32
xmax
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SPL1W
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Bl/√RE
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Pmax
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