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Brand
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Type
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Available on
Amazon.comParts Express
•
Nominal diameter
″
•
SensitivitySPL1W
dB

Thiele & Small parameters

•
Resonance frequencyfS
Hz
•
Mechanical quality factorQMS
•
Electrical quality factorQES
•
Total quality factorQTS

Large signal parameters

•
Maximum linear excursionxmax
mm
•
Air volume displaced at xmaxVD
cm³
•
Program powerPmax
W

Voice Coil & Magnet

•
Nominal impedanceZ
Ω
•
DC resistanceRE
Ω
•
Force factorBl
N/A
•
Motor constantBl/√RE
N/√W
•
InductanceLE
mH
•
VC Diameter
mm

Diaphragm

•
Effective diameter
mm
•
Effective areaSD
cm²
•
Moving massMMS
g

Suspensions

•
StiffnessKMS
N/mm
•
ComplianceCMS
µm/N
•
Equivalent volume to CMSVAS
L
•
Mechanical resistanceRMS
N·s/m

Dimensions

•
Overall size
mm
•
Baffle cutout diameter
mm
•
Overall depth
mm
•
Mounting depth
mm
•
Volume occupied
L
•
Net weight
kg
Focal EC 165 KE 2 way
Focal  EC 165 KE4 Ω
6.5″2 way
fS
65 Hz
SD
129 cm²
60 - 22000 Hz
QTS
0.55
xmax
4.5 mm
SPL1W
88 dB
Bl/√RE
3.06
Pmax
160 W
HELIX CB C87.2-S3 2 way
HELIX  CB C87.2-S33 Ω
3.5″2 way
fS
92 Hz
SD
36 cm²
110 - 22000 Hz
QTS
0.62
xmax
2.2 mm
SPL1W
84 dB
Bl/√RE
1.67
Pmax
60 W
HELIX CB C690.2-S3 2 way
HELIX  CB C690.2-S33 Ω
6 x 9″2 way
fS
56 Hz
SD
205 cm²
50 - 22000 Hz
QTS
0.54
xmax
2.0 mm
SPL1W
90 dB
Bl/√RE
3.24
Pmax
150 W
HELIX CB C570.2-S3 2 way
HELIX  CB C570.2-S33 Ω
5 x 7″2 way
fS
67 Hz
SD
149 cm²
60 - 22000 Hz
QTS
0.81
xmax
2.5 mm
SPL1W
87 dB
Bl/√RE
2.42
Pmax
105 W
HELIX CB C460.2-S3 2 way
HELIX  CB C460.2-S33 Ω
4 x 6″2 way
fS
120 Hz
SD
77 cm²
90 - 22000 Hz
QTS
0.96
xmax
2.5 mm
SPL1W
87 dB
Bl/√RE
2.39
Pmax
75 W
HELIX CB C165.2-S3 2 way
HELIX  CB C165.2-S33 Ω
6.5″2 way
fS
65 Hz
SD
139 cm²
60 - 22000 Hz
QTS
0.78
xmax
2.5 mm
SPL1W
88 dB
Bl/√RE
2.37
Pmax
120 W
HELIX CB C130.2-S3 2 way
HELIX  CB C130.2-S33 Ω
5″2 way
fS
92 Hz
SD
97 cm²
80 - 22000 Hz
QTS
0.92
xmax
2.5 mm
SPL1W
87 dB
Bl/√RE
2.19
Pmax
105 W
HELIX CB C100.2-S3 2 way
HELIX  CB C100.2-S33 Ω
4″2 way
fS
113 Hz
SD
45 cm²
100 - 22000 Hz
QTS
0.87
xmax
2.5 mm
SPL1W
83 dB
Bl/√RE
2.25
Pmax
90 W