HELIX IK S8
Shallow subwoofer
8″ / 200 mm
Nominal diameter
43 Hz
Resonance
0.51
Q factor
84 dB
Sensitivity
± 6 mm
Linear excursion
600 W
Program Power
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Sensitivity (1W, 1m, infinite baffle)
SPL1W
84.1
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
43.0
Hz
Mechanical quality factor
QMS
4.79
Electrical quality factor
QES
0.57
Total quality factor
QTS
0.51
Large signal parameters
Maximum linear excursion
xmax
6.0
mm
Air volume displaced at xmax
VD
133
cm³
Power handling
P
300
W
Program power
Pmax
600
W
Voice Coil
Nominal impedance
Z
2 x 2
Ω
DC resistance (in series)
RE
3.6
Ω
Inductance (1kHz, in series, estimated)
LE
0.73
mH
VC Diameter
51
mm
Winding height
HVC
19
mm
Magnet
Force factor (in series)
Bl
11.9
N/A
Motor constant
Bl/√RE
6.27
N/√W
Diaphragm
Effective diameter
168
mm
Effective area
SD
222
cm²
Moving mass
MMS
82
g
Moving mass (without air load)
MMD
79.5
g
Suspensions
Stiffness
KMS
6.25
N/mm
Compliance
CMS
160
µm/N
Equivalent volume to the compliance
VAS
11
L
Mechanical resistance
RMS
4.7
N·s/m
Dimensions
Nominal diameter
8
″
200
mm
Overall diameter
213
mm
Baffle cutout diameter
180
mm
Mounting depth
80
mm
Volume occupied by the driver (estimated)
0.96
L
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SD
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QTS
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Bl/√RE
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SD
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QTS
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xmax
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