Beyma CM-8/B

Woofer

8″ / 200 mm
Nominal diameter
73 Hz
Resonance
0.62
Q factor
91 dB
Sensitivity
± 6.7 mm
Linear excursion
200 W
Program Power
Discontinued
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
Discard
Apply
Sensitivity (1w, 1m, infinite baffle)
SPL1W
91.3
dB
Frequency response
40 - 5000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
73.0
Hz
Mechanical quality factor
QMS
13.46
Electrical quality factor
QES
0.65
Total quality factor
QTS
0.62

Large signal parameters

Maximum linear excursion
xmax
6.7
mm
Maximum excursion before damage
xlim
12.5
mm
Air volume displaced at xmax
VD
147
cm³
Power handling
P
100
W
Program power
Pmax
200
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
6.2
Ω
Inductance (1kHz)
LE
1.2
mH
VC Diameter
38
mm
Winding height
HVC
16
mm

Magnet

Force factor
Bl
9.8
N/A
Motor constant
Bl/√RE
3.94
N/√W
Air gap height
HAG
6
mm
Material
Ferrite

Diaphragm

Effective diameter
167
mm
Effective area
SD
220
cm²
Moving mass
MMS
22
g
Moving mass (without air load)
MMD
19.7
g

Suspensions

Stiffness
KMS
4.63
N/mm
Compliance
CMS
216
µm/N
Equivalent volume to the compliance
VAS
14.6
L
Mechanical resistance
RMS
0.75
N·s/m

Dimensions

Nominal diameter
8
200
mm
Volume occupied by the driver (estimated)
0.9
L
Net weight
2.18
kg
Beyma CM-8/B Impedance
Beyma CM-8/B SPL & Distortion

Export this driver to a simulation software:

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SD
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