BMS 12N820

Woofer

12″ / 318 mm
Nominal diameter
38 Hz
Resonance
0.16
Q factor
97 dB
Sensitivity
± 4.5 mm
Linear excursion
1600 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
96.8
dB
Frequency response
45 - 1700
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
37.8
Hz
Mechanical quality factor
QMS
5.30
Electrical quality factor
QES
0.16
Total quality factor
QTS
0.16

Large signal parameters

Maximum linear excursion
xmax
4.5
mm
Air volume displaced at xmax
VD
239
cm³
Power handling
P
800
W
Program power
Pmax
1600
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.7
Ω
Inductance (1kHz)
LE
0.62
mH
VC Diameter
102
mm
Winding height
HVC
19
mm
Winding material
Copper

Magnet

Force factor
Bl
24.2
N/A
Motor constant
Bl/√RE
10.1
N/√W
Air gap height
HAG
10
mm
Material
Neodymium

Diaphragm

Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
72
g
Moving mass (without air load)
MMD
63.2
g

Suspensions

Stiffness
KMS
4.0
N/mm
Compliance
CMS
250
µm/N
Equivalent volume to the compliance
VAS
98.7
L
Mechanical resistance
RMS
3.23
N·s/m

Dimensions

Nominal diameter
12
318
mm
Overall diameter
318
mm
Baffle cutout diameter
284
mm
Overall depth
155
mm
Volume occupied by the driver (estimated)
2.7
L
Net weight
5.5
kg
Frame material
Cast Aluminum
BMS 12N820 Impedance
BMS 12N820 SPL & Distortion
BMS 12N820 Dimensions

Export this driver to a simulation software:

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SD
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