JL Audio C7-650cw

Woofer

6.5″ / 165 mm
Nominal diameter
55 Hz
Resonance
0.61
Q factor
87 dB
Sensitivity
± 5 mm
Linear excursion
250 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
86.8
dB

Thiele & Small parameters

Resonance frequency (free air)
fS
54.5
Hz
Mechanical quality factor
QMS
6.27
Electrical quality factor
QES
0.67
Total quality factor
QTS
0.61

Large signal parameters

Maximum linear excursion
xmax
5.0
mm
Air volume displaced at xmax
VD
69
cm³
Power handling
P
125
W
Program power
Pmax
250
W

Voice Coil

Nominal impedance
Z
4
Ω
DC resistance
RE
3.1
Ω
Inductance (1kHz, estimated)
LE
0.25
mH

Magnet

Force factor
Bl
5.31
N/A
Motor constant
Bl/√RE
3.01
N/√W
Diameter
100
mm

Diaphragm

Effective diameter
133
mm
Effective area
SD
138
cm²
Moving mass
MMS
17.7
g
Moving mass (without air load)
MMD
16.4
g

Suspensions

Stiffness
KMS
2.08
N/mm
Compliance
CMS
482
µm/N
Equivalent volume to the compliance
VAS
13.1
L
Mechanical resistance
RMS
0.97
N·s/m

Dimensions

Nominal diameter
6.5
165
mm
Overall diameter
183
mm
Baffle cutout diameter
141
mm
Overall depth
95
mm
Flange thickness
25
mm
Mounting depth
70
mm
Volume occupied by the driver (estimated)
0.69
L
JL Audio C7-650cw SPL & Impedance
JL Audio C7-650cw Dimensions

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SD
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QTS
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