BMS 12CN680

Coaxial

12″ / 318 mm
Nominal diameter
46 Hz
Resonance
0.26
Q factor
95 dB
Sensitivity
± 5.5 mm
Linear excursion
1000 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
94.9
dB
Frequency response
50 - 20000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
46.0
Hz
Mechanical quality factor
QMS
5.80
Electrical quality factor
QES
0.27
Total quality factor
QTS
0.26

Large signal parameters

Maximum linear excursion
xmax
5.5
mm
Air volume displaced at xmax
VD
268
cm³
Power handling
P
500
W
Program power
Pmax
1000
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.7
Ω
Inductance (1kHz)
LE
0.6
mH
VC Diameter
77
mm
Winding height
HVC
19
mm
Winding material
Copper
Former material
Kapton

Magnet

Flux density
B
2.2
T
Force factor
Bl
20.6
N/A
Motor constant
Bl/√RE
8.63
N/√W
Air gap height
HAG
8
mm
Material
Neodymium

Diaphragm

Effective diameter
249
mm
Effective area
SD
487
cm²
Moving mass
MMS
69
g
Moving mass (without air load)
MMD
61
g
Material
Polyester

Suspensions

Stiffness
KMS
5.88
N/mm
Compliance
CMS
170
µm/N
Equivalent volume to the compliance
VAS
58
L
Mechanical resistance
RMS
3.44
N·s/m

Dimensions

Nominal diameter
12
318
mm
Overall diameter
318
mm
Baffle cutout diameter
284
mm
Overall depth
180
mm
Volume occupied by the driver (estimated)
2.8
L
Net weight
5.1
kg
Frame material
Cast Aluminum
BMS 12CN680 Impedance
BMS 12CN680 SPL
BMS 12CN680 Dimensions

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