6.5″ / 170 mm
Nominal diameter
69 Hz
Resonance
0.39
Q factor
90 dB
Sensitivity
± 6 mm
Linear excursion
300 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
89.6
dB
Frequency response
70 - 5000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
69.0
Hz
Mechanical quality factor
QMS
10.05
Electrical quality factor
QES
0.40
Total quality factor
QTS
0.39
Large signal parameters
Maximum linear excursion
xmax
6.0
mm
Air volume displaced at xmax
VD
79
cm³
Power handling
P
150
W
Program power
Pmax
300
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.1
Ω
Inductance (1kHz)
LE
0.4
mH
VC Diameter
38
mm
Winding height
HVC
12
mm
Winding material
Copper
Former material
Kapton
Magnet
Flux density
B
1.15
T
Force factor
Bl
7.8
N/A
Motor constant
Bl/√RE
4.43
N/√W
Air gap height
HAG
6
mm
Material
Neodymium Ring
Diaphragm
Effective diameter
130
mm
Effective area
SD
132
cm²
Moving mass
MMS
18
g
Moving mass (without air load)
MMD
16.8
g
Material
Waterproof Front Side
Suspensions
Stiffness
KMS
3.4
N/mm
Compliance
CMS
294
µm/N
Equivalent volume to the compliance
VAS
7.1
L
Mechanical resistance
RMS
0.78
N·s/m
Dimensions
Nominal diameter
6.5
″
170
mm
Overall diameter
187
mm
Baffle cutout diameter
145
mm
Overall depth
85
mm
Flange thickness
11
mm
Mounting depth
74
mm
Volume occupied by the driver
0.63
L
Net weight
1.2
kg
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Export this driver to a simulation software:
WinISD
Basta!
Hornresp
QSpeakers
SpeakerSim
MfbLabs
SpeakerbenchSimilar woofers to B&C Speaker 6NDL38
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6.5″Woofer
fS
72 Hz
SD
132 cm²
70 - 6000 Hz
QTS
0.42
xmax
6.0 mm
SPL1W
90 dB
Bl/√RE
4.17
Pmax
300 W
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