JL Audio C7-350cm

Mid-range

3.5″ / 90 mm
Nominal diameter
157 Hz
Resonance
0.54
Q factor
87 dB
Sensitivity
± 1 mm
Linear excursion
200 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
86.5
dB

Thiele & Small parameters

Resonance frequency (free air)
fS
157
Hz
Mechanical quality factor
QMS
6.45
Electrical quality factor
QES
0.59
Total quality factor
QTS
0.54

Large signal parameters

Maximum linear excursion
xmax
1.0
mm
Air volume displaced at xmax
VD
3.4
cm³
Power handling
P
100
W
Program power
Pmax
200
W

Voice Coil

Nominal impedance
Z
4
Ω
DC resistance
RE
3.2
Ω
Inductance (1kHz, estimated)
LE
0.1
mH

Magnet

Force factor
Bl
4.66
N/A
Motor constant
Bl/√RE
2.59
N/√W
Diameter
60
mm

Diaphragm

Effective diameter
66
mm
Effective area
SD
34
cm²
Moving mass
MMS
4
g
Moving mass (without air load)
MMD
3.8
g

Suspensions

Stiffness
KMS
3.89
N/mm
Compliance
CMS
257
µm/N
Equivalent volume to the compliance
VAS
0.43
L
Mechanical resistance
RMS
0.61
N·s/m

Dimensions

Nominal diameter
3.5
90
mm
Overall diameter
100
mm
Baffle cutout diameter
73
mm
Overall depth
52
mm
Flange thickness
15
mm
Mounting depth
37
mm
Volume occupied by the driver (estimated)
0.14
L
JL Audio C7-350cm SPL & Impedance
JL Audio C7-350cm Dimensions

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HELIX S 3M Mid-range
3Mid-range
fS
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SD
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400 - 6000 Hz
QTS
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xmax
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Pmax
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HELIX P 3M Mid-range
3Mid-range
fS
130 Hz
SD
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QTS
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xmax
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