accuton C168-6-990
Mid-range
6.5″ / 168 mm
Nominal diameter
55 Hz
Resonance
0.21
Q factor
92 dB
Sensitivity
± 3 mm
Linear excursion
240 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
92.4
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
55.0
Hz
Mechanical quality factor
QMS
4.76
Electrical quality factor
QES
0.22
Total quality factor
QTS
0.21
Large signal parameters
Maximum linear excursion
xmax
3.0
mm
Air volume displaced at xmax
VD
40
cm³
Power handling
P
120
W
Program power
Pmax
240
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.4
Ω
Inductance (1kHz)
LE
0.06
mH
Winding material
Copper
Former material
Titanium
Magnet
Force factor
Bl
11.66
N/A
Motor constant
Bl/√RE
5.02
N/√W
Diameter
146
mm
Height
28
mm
Diaphragm
Effective diameter
130
mm
Effective area
SD
133
cm²
Moving mass
MMS
16.1
g
Moving mass (without air load)
MMD
14.9
g
Material
Ceramic
Suspensions
Stiffness
KMS
1.92
N/mm
Compliance
CMS
520
µm/N
Equivalent volume to the compliance
VAS
13.1
L
Mechanical resistance
RMS
1.17
N·s/m
Dimensions
Nominal diameter
6.5
″
168
mm
Overall diameter
168
mm
Baffle cutout diameter
147
mm
Overall depth
50
mm
Flange thickness
6
mm
Mounting depth
44
mm
Volume occupied by the driver (estimated)
0.26
L
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6.5″Woofer
fS
64 Hz
SD
133 cm²
63 - 5500 Hz
QTS
0.24
xmax
5.0 mm
SPL1W
92 dB
Bl/√RE
4.58
Pmax
260 W
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6.5″Woofer
fS
45 Hz
SD
140 cm²
45 - 4000 Hz
QTS
0.24
xmax
5.5 mm
SPL1W
89 dB
Bl/√RE
5.34
Pmax
100 W