HELIX IK W8
Subwoofer
8″ / 200 mm
Nominal diameter
37 Hz
Resonance
0.41
Q factor
85 dB
Sensitivity
± 8 mm
Linear excursion
600 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
84.8
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
37.0
Hz
Mechanical quality factor
QMS
3.56
Electrical quality factor
QES
0.46
Total quality factor
QTS
0.41
Large signal parameters
Maximum linear excursion
xmax
8.0
mm
Air volume displaced at xmax
VD
175
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
3.3
Ω
Inductance (1kHz, in series, estimated)
LE
0.6
mH
VC Diameter
51
mm
Winding height
HVC
24
mm
Magnet
Force factor (in series)
Bl
10.7
N/A
Motor constant
Bl/√RE
5.89
N/√W
Diaphragm
Effective diameter
167
mm
Effective area
SD
219
cm²
Moving mass
MMS
69
g
Moving mass (without air load)
MMD
66.6
g
Suspensions
Stiffness
KMS
3.82
N/mm
Compliance
CMS
262
µm/N
Equivalent volume to the compliance
VAS
17
L
Mechanical resistance
RMS
4.54
N·s/m
Dimensions
Nominal diameter
8
″
200
mm
Overall diameter
214
mm
Baffle cutout diameter
182
mm
Mounting depth
101
mm
Volume occupied by the driver (estimated)
0.98
L
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fS
45 Hz
SD
330 cm²
40 - 600 Hz
QTS
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xmax
11.0 mm
SPL1W
84 dB
Bl/√RE
7.47
Pmax
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