HELIX COMPOSE Ci3 C100.2FM-S3

Mid-range

4″ / 100 mm
Nominal diameter
137 Hz
Resonance
0.66
Q factor
90 dB
Sensitivity
± 2 mm
Linear excursion
120 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
90.2
dB
Frequency response
100 - 25000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
137
Hz
Mechanical quality factor
QMS
4.37
Electrical quality factor
QES
0.78
Total quality factor
QTS
0.66

Large signal parameters

Maximum linear excursion
xmax
2.0
mm
Air volume displaced at xmax
VD
11
cm³
Power handling
P
80
W
Program power
Pmax
120
W

Voice Coil

Nominal impedance
Z
3
Ω
DC resistance
RE
3.0
Ω
Inductance (1kHz, estimated)
LE
0.08
mH
VC Diameter
25
mm
Winding height
HVC
4.8
mm

Magnet

Force factor
Bl
3.2
N/A
Motor constant
Bl/√RE
1.85
N/√W

Diaphragm

Effective diameter
85
mm
Effective area
SD
57
cm²
Moving mass
MMS
3
g
Moving mass (without air load)
MMD
2.7
g

Suspensions

Stiffness
KMS
2.19
N/mm
Compliance
CMS
456
µm/N
Equivalent volume to the compliance
VAS
2.1
L
Mechanical resistance
RMS
0.58
N·s/m

Dimensions

Nominal diameter
4
100
mm
Overall diameter
98
mm
Baffle cutout diameter
89
mm
Mounting depth
30
mm
Volume occupied by the driver (estimated)
0.13
L

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