HELIX PURE S 4B

Mid Bass

4″ / 100 mm
Nominal diameter
120 Hz
Resonance
0.88
Q factor
87 dB
Sensitivity
± 3 mm
Linear excursion
140 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
86.9
dB
Frequency response
75 - 6000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
120
Hz
Mechanical quality factor
QMS
4.24
Electrical quality factor
QES
1.11
Total quality factor
QTS
0.88

Large signal parameters

Maximum linear excursion
xmax
3.0
mm
Air volume displaced at xmax
VD
18
cm³
Power handling
P
70
W
Program power
Pmax
140
W

Voice Coil

Nominal impedance
Z
4
Ω
DC resistance
RE
3.4
Ω
Inductance (1kHz, estimated)
LE
0.14
mH
VC Diameter
25
mm
Winding height
HVC
12
mm

Magnet

Force factor
Bl
4.1
N/A
Motor constant
Bl/√RE
2.22
N/√W

Diaphragm

Effective diameter
88
mm
Effective area
SD
61
cm²
Moving mass
MMS
5.9
g
Moving mass (without air load)
MMD
5.6
g

Suspensions

Stiffness
KMS
4.31
N/mm
Compliance
CMS
232
µm/N
Equivalent volume to the compliance
VAS
1.2
L
Mechanical resistance
RMS
1.19
N·s/m

Dimensions

Nominal diameter
4
100
mm
Overall diameter
102
mm
Baffle cutout diameter
92
mm
Mounting depth
47
mm
Volume occupied by the driver (estimated)
0.14
L

Export this driver to a simulation software:

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