HELIX COMPOSE Ci3 C165.2FM-S3
Mid Bass
6.5″ / 165 mm
Nominal diameter
72 Hz
Resonance
0.82
Q factor
88 dB
Sensitivity
± 3.2 mm
Linear excursion
150 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
88.2
dB
Frequency response
60 - 25000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
72.0
Hz
Mechanical quality factor
QMS
4.02
Electrical quality factor
QES
1.04
Total quality factor
QTS
0.82
Large signal parameters
Maximum linear excursion
xmax
3.2
mm
Air volume displaced at xmax
VD
43
cm³
Power handling
P
100
W
Program power
Pmax
150
W
Voice Coil
Nominal impedance
Z
3
Ω
DC resistance
RE
3.1
Ω
Inductance (1kHz, estimated)
LE
0.18
mH
VC Diameter
25
mm
Winding height
HVC
10.5
mm
Magnet
Force factor
Bl
3.8
N/A
Motor constant
Bl/√RE
2.16
N/√W
Diaphragm
Effective diameter
130
mm
Effective area
SD
133
cm²
Moving mass
MMS
10.4
g
Moving mass (without air load)
MMD
9.3
g
Suspensions
Stiffness
KMS
2.15
N/mm
Compliance
CMS
466
µm/N
Equivalent volume to the compliance
VAS
11.5
L
Mechanical resistance
RMS
1.17
N·s/m
Dimensions
Nominal diameter
6.5
″
165
mm
Overall diameter
165
mm
Baffle cutout diameter
142
mm
Mounting depth
61
mm
Volume occupied by the driver (estimated)
0.5
L
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SpeakerbenchSimilar speaker drivers to HELIX Ci3 C165.2FM-S3
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6.5″Mid Bass
fS
70 Hz
SD
133 cm²
60 - 3500 Hz
QTS
0.84
xmax
3.2 mm
SPL1W
88 dB
Bl/√RE
2.31
Pmax
150 W
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6″Full-range
fS
70 Hz
SD
117 cm²
70 - 20000 Hz
QTS
0.67
xmax
1.0 mm
SPL1W
89 dB
Bl/√RE
1.8
Pmax
50 W
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