Beyma CM-6
Mid-range
6.5″ / 165 mm
Nominal diameter
138 Hz
Resonance
0.93
Q factor
91 dB
Sensitivity
± 2.5 mm
Linear excursion
160 W
Program Power
Discontinued
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
90.6
dB
Frequency response
150 - 6000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
138
Hz
Mechanical quality factor
QMS
4.74
Electrical quality factor
QES
1.16
Total quality factor
QTS
0.93
Large signal parameters
Maximum linear excursion
xmax
2.5
mm
Maximum excursion before damage
xlim
10.35
mm
Air volume displaced at xmax
VD
35
cm³
Power handling
P
80
W
Program power
Pmax
160
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.0
Ω
Inductance (1kHz)
LE
0.6
mH
VC Diameter
39
mm
Winding height
HVC
7.5
mm
Magnet
Force factor
Bl
8.1
N/A
Motor constant
Bl/√RE
3.31
N/√W
Air gap height
HAG
6
mm
Material
Ferrite
Diaphragm
Effective diameter
134
mm
Effective area
SD
140
cm²
Moving mass
MMS
14
g
Moving mass (without air load)
MMD
12.8
g
Suspensions
Stiffness
KMS
11.09
N/mm
Compliance
CMS
90
µm/N
Equivalent volume to the compliance
VAS
2.47
L
Mechanical resistance
RMS
2.69
N·s/m
Dimensions
Nominal diameter
6.5
″
165
mm
Volume occupied by the driver (estimated)
0.89
L
Net weight
2.16
kg
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SpeakerbenchSimilar speaker drivers to Beyma CM-6
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6.5″Mid-range
fS
149 Hz
SD
133 cm²
136 - 6500 Hz
QTS
1.10
xmax
0.3 mm
SPL1W
93 dB
Bl/√RE
2.51
Pmax
200 W
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4 x 6″2 way
fS
120 Hz
SD
77 cm²
90 - 22000 Hz
QTS
0.96
xmax
2.5 mm
SPL1W
87 dB
Bl/√RE
2.39
Pmax
75 W
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6″Mid Bass
fS
124 Hz
SD
154 cm²
125 - 6500 Hz
QTS
0.97
xmax
4.8 mm
SPL1W
92 dB
Bl/√RE
3.01
Pmax
200 W