Beyma 12CMV2

Subwoofer

12″ / 300 mm
Nominal diameter
49 Hz
Resonance
0.47
Q factor
94 dB
Sensitivity
± 7 mm
Linear excursion
640 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
Discard
Apply
Sensitivity (1W, 1m, infinite baffle)
SPL1W
93.5
dB
Frequency response
50 - 6000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
49.0
Hz
Mechanical quality factor
QMS
3.90
Electrical quality factor
QES
0.54
Total quality factor
QTS
0.47

Large signal parameters

Maximum linear excursion
xmax
7.0
mm
Maximum excursion before damage
xlim
29.0
mm
Air volume displaced at xmax
VD
371
cm³
Power handling
P
320
W
Program power
Pmax
640
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
6.0
Ω
Inductance (1kHz)
LE
1.0
mH
VC Diameter
64
mm
Winding height
HVC
17
mm

Magnet

Force factor
Bl
13.7
N/A
Motor constant
Bl/√RE
5.59
N/√W
Air gap height
HAG
7
mm

Diaphragm

Effective diameter
260
mm
Effective area
SD
530
cm²
Moving mass
MMS
54
g
Moving mass (without air load)
MMD
45.4
g

Suspensions

Stiffness
KMS
5.18
N/mm
Compliance
CMS
193
µm/N
Equivalent volume to the compliance
VAS
76
L
Mechanical resistance
RMS
4.2
N·s/m

Dimensions

Nominal diameter
12
300
mm
Overall diameter
310
mm
Baffle cutout diameter
280
mm
Overall depth
130
mm
Volume occupied by the driver (estimated)
2.1
L
Net weight
4.6
kg
Beyma 12CMV2 SPL & Impedance
Beyma 12CMV2 Dimensions

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