HELIX PURE C 6B
Woofer
6.5″ / 165 mm
Nominal diameter
54 Hz
Resonance
0.53
Q factor
87 dB
Sensitivity
± 3 mm
Linear excursion
300 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
87.3
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
54.0
Hz
Mechanical quality factor
QMS
11.10
Electrical quality factor
QES
0.55
Total quality factor
QTS
0.53
Large signal parameters
Maximum linear excursion
xmax
3.0
mm
Air volume displaced at xmax
VD
41
cm³
Power handling
P
150
W
Program power
Pmax
300
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.4
Ω
Inductance (1kHz, estimated)
LE
0.27
mH
VC Diameter
37
mm
Winding height
HVC
12
mm
Magnet
Force factor
Bl
6.1
N/A
Motor constant
Bl/√RE
3.31
N/√W
Diaphragm
Effective diameter
131
mm
Effective area
SD
135
cm²
Moving mass
MMS
17.8
g
Moving mass (without air load)
MMD
16.6
g
Suspensions
Stiffness
KMS
2.04
N/mm
Compliance
CMS
490
µm/N
Equivalent volume to the compliance
VAS
12.4
L
Mechanical resistance
RMS
0.54
N·s/m
Dimensions
Nominal diameter
6.5
″
165
mm
Overall diameter
166
mm
Baffle cutout diameter
145
mm
Mounting depth
67
mm
Volume occupied by the driver (estimated)
0.51
L
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SpeakerbenchSimilar woofers to HELIX C 6B
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6.5″2 way kit
fS
55 Hz
SD
129 cm²
55 - 22000 Hz
QTS
0.55
xmax
5.3 mm
SPL1W
87 dB
Bl/√RE
2.98
Pmax
240 W
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6.5″3 way kit
fS
54 Hz
SD
129 cm²
45 - 22000 Hz
QTS
0.48
xmax
5.3 mm
SPL1W
87 dB
Bl/√RE
3.24
Pmax
240 W