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
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
Discard
Apply
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
accuton C168-6-990 Impedance
accuton C168-6-990 SPL
accuton C168-6-990 Distortion
accuton C168-6-990 Dimensions

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