HELIX COMPOSE Ci3 W165FM-S2
Mid Bass
6.5″ / 165 mm
Nominal diameter
74 Hz
Resonance
0.74
Q factor
88 dB
Sensitivity
± 3.7 mm
Linear excursion
150 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
88.1
dB
Frequency response
60 - 3500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
74.0
Hz
Mechanical quality factor
QMS
3.92
Electrical quality factor
QES
0.92
Total quality factor
QTS
0.74
Large signal parameters
Maximum linear excursion
xmax
3.7
mm
Air volume displaced at xmax
VD
49
cm³
Power handling
P
100
W
Program power
Pmax
150
W
Voice Coil
Nominal impedance
Z
2
Ω
DC resistance
RE
1.8
Ω
Inductance (1kHz, estimated)
LE
0.11
mH
VC Diameter
25
mm
Winding height
HVC
11.3
mm
Magnet
Force factor
Bl
3.5
N/A
Motor constant
Bl/√RE
2.61
N/√W
Diaphragm
Effective diameter
130
mm
Effective area
SD
133
cm²
Moving mass
MMS
12.5
g
Moving mass (without air load)
MMD
11.4
g
Suspensions
Stiffness
KMS
2.7
N/mm
Compliance
CMS
370
µm/N
Equivalent volume to the compliance
VAS
8.8
L
Mechanical resistance
RMS
1.48
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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6″2 Way
fS
70 Hz
SD
118 cm²
50 - 21000 Hz
QTS
0.62
xmax
2.7 mm
SPL1W
89 dB
Bl/√RE
2.52
Pmax
120 W
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6″2 Way Kit
fS
70 Hz
SD
120 cm²
50 - 23000 Hz
QTS
0.62
xmax
2.7 mm
SPL1W
89 dB
Bl/√RE
2.52
Pmax
160 W