6.5″ / 165 mm
Nominal diameter
67 Hz
Resonance
0.77
Q factor
87 dB
Sensitivity
± 3 mm
Linear excursion
200 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
Sensitivity (1W, 1m, infinite baffle)
SPL1W
87.2
dB
Frequency response
45 - 4000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
67.0
Hz
Mechanical quality factor
QMS
3.87
Electrical quality factor
QES
0.96
Total quality factor
QTS
0.77
Large signal parameters
Maximum linear excursion
xmax
3.0
mm
Air volume displaced at xmax
VD
42
cm³
Power handling
P
100
W
Program power
Pmax
200
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.4
Ω
Inductance (1kHz, estimated)
LE
0.24
mH
VC Diameter
25
mm
Winding height
HVC
12
mm
Magnet
Force factor
Bl
4.8
N/A
Motor constant
Bl/√RE
2.6
N/√W
Diaphragm
Effective diameter
134
mm
Effective area
SD
141
cm²
Moving mass
MMS
14.8
g
Moving mass (without air load)
MMD
13.6
g
Suspensions
Stiffness
KMS
2.7
N/mm
Compliance
CMS
370
µm/N
Equivalent volume to the compliance
VAS
10.3
L
Mechanical resistance
RMS
1.64
N·s/m
Dimensions
Nominal diameter
6.5
″
165
mm
Overall diameter
165
mm
Baffle cutout diameter
143
mm
Mounting depth
65
mm
Volume occupied by the driver (estimated)
0.5
L
Similar speaker drivers to HELIX S 6B
6.5″2 Way
fS
65 Hz
SD
125 cm²
50 - 25000 Hz
QTS
0.70
xmax
3.7 mm
SPL1W
88 dB
Bl/√RE
2.78
Pmax
150 W
6.5″2 Way
fS
65 Hz
SD
125 cm²
50 - 25000 Hz
QTS
0.70
xmax
3.7 mm
SPL1W
88 dB
Bl/√RE
2.78
Pmax
150 W
6.5″2 Way
fS
65 Hz
SD
125 cm²
50 - 25000 Hz
QTS
0.70
xmax
3.7 mm
SPL1W
88 dB
Bl/√RE
2.78
Pmax
150 W