HELIX PURE P 6B
Mid Bass
6.5″ / 165 mm
Nominal diameter
56 Hz
Resonance
0.49
Q factor
88 dB
Sensitivity
± 3 mm
Linear excursion
200 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
88.0
dB
Frequency response
40 - 4000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
56.0
Hz
Mechanical quality factor
QMS
5.48
Electrical quality factor
QES
0.54
Total quality factor
QTS
0.49
Large signal parameters
Maximum linear excursion
xmax
3.0
mm
Air volume displaced at xmax
VD
39
cm³
Power handling
P
100
W
Program power
Pmax
200
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.5
Ω
Inductance (1kHz, estimated)
LE
0.24
mH
VC Diameter
25
mm
Winding height
HVC
12
mm
Magnet
Force factor
Bl
5.7
N/A
Motor constant
Bl/√RE
3.05
N/√W
Diaphragm
Effective diameter
128
mm
Effective area
SD
129
cm²
Moving mass
MMS
14.3
g
Moving mass (without air load)
MMD
13.2
g
Suspensions
Stiffness
KMS
1.75
N/mm
Compliance
CMS
571
µm/N
Equivalent volume to the compliance
VAS
13.2
L
Mechanical resistance
RMS
0.91
N·s/m
Dimensions
Nominal diameter
6.5
″
165
mm
Overall diameter
166
mm
Baffle cutout diameter
142
mm
Mounting depth
67
mm
Volume occupied by the driver (estimated)
0.51
L
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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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