HELIX COMPOSE CB C165.2-S3

2 way

6.5″ / 165 mm
Nominal diameter
65 Hz
Resonance
0.78
Q factor
88 dB
Sensitivity
± 2.5 mm
Linear excursion
120 W
Program Power
HELIX CB C165.2-S3 2 way
Excursion
Velocity
SPL
Phase
Group delay
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
87.7
dB
Frequency response
60 - 22000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
65.0
Hz
Mechanical quality factor
QMS
4.78
Electrical quality factor
QES
0.93
Total quality factor
QTS
0.78

Large signal parameters

Maximum linear excursion
xmax
2.5
mm
Air volume displaced at xmax
VD
35
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
0.19
mH
VC Diameter
25
mm
Winding height
HVC
8.9
mm

Magnet

Force factor
Bl
4.1
N/A
Motor constant
Bl/√RE
2.37
N/√W

Diaphragm

Effective diameter
133
mm
Effective area
SD
139
cm²
Moving mass
MMS
12.5
g
Moving mass (without air load)
MMD
11.3
g

Suspensions

Stiffness
KMS
2.08
N/mm
Compliance
CMS
480
µm/N
Equivalent volume to the compliance
VAS
12.9
L
Mechanical resistance
RMS
1.09
N·s/m

Dimensions

Nominal diameter
6.5
″
165
mm
Overall diameter
166
mm
Baffle cutout diameter
143
mm
Mounting depth
61
mm
Volume occupied by the driver (estimated)
0.51
L
Impedance
Step response
Tone Burst
DatasheetDatasheet

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HELIX CB C570.2-S3 2 way
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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