HELIX COMPOSE CB C87.2-S3

2 way

3.5″ / 87 mm
Nominal diameter
92 Hz
Resonance
0.62
Q factor
84 dB
Sensitivity
± 2.2 mm
Linear excursion
60 W
Program Power
HELIX CB C87.2-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
83.9
dB
Frequency response
110 - 22000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
92.0
Hz
Mechanical quality factor
QMS
3.80
Electrical quality factor
QES
0.74
Total quality factor
QTS
0.62

Large signal parameters

Maximum linear excursion
xmax
2.2
mm
Air volume displaced at xmax
VD
7.9
cm³
Power handling
P
40
W
Program power
Pmax
60
W

Voice Coil

Nominal impedance
Z
3
Ω
DC resistance
RE
3.0
Ω
Inductance (1kHz, estimated)
LE
0.09
mH
VC Diameter
25
mm
Winding height
HVC
8.3
mm

Magnet

Force factor
Bl
2.9
N/A
Motor constant
Bl/√RE
1.67
N/√W

Diaphragm

Effective diameter
68
mm
Effective area
SD
36
cm²
Moving mass
MMS
3.6
g
Moving mass (without air load)
MMD
3.4
g

Suspensions

Stiffness
KMS
1.22
N/mm
Compliance
CMS
820
µm/N
Equivalent volume to the compliance
VAS
1.5
L
Mechanical resistance
RMS
0.52
N·s/m

Dimensions

Nominal diameter
3.5
″
87
mm
Overall diameter
87
mm
Baffle cutout diameter
79
mm
Mounting depth
42
mm
Impedance
Step response
Tone Burst
DatasheetDatasheet

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