12″ / 320 mm
Nominal diameter
50 Hz
Resonance
0.27
Q factor
96 dB
Sensitivity
± 7 mm
Linear excursion
800 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
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.9
dB
Frequency response
50 - 2000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
50.0
Hz
Mechanical quality factor
QMS
3.80
Electrical quality factor
QES
0.30
Total quality factor
QTS
0.27
Large signal parameters
Maximum linear excursion
xmax
7.0
mm
Air volume displaced at xmax
VD
365
cm³
Power handling
P
400
W
Program power
Pmax
800
W
Voice Coil
Nominal impedance
Z
16
Ω
DC resistance
RE
10.2
Ω
Inductance (1kHz)
LE
1.7
mH
VC Diameter
76
mm
Winding height
HVC
19
mm
Winding material
Aluminium
Former material
Glass Fibre
Magnet
Flux density
B
1.25
T
Force factor
Bl
24.7
N/A
Motor constant
Bl/√RE
7.73
N/√W
Air gap height
HAG
10
mm
Material
Neodymium Inside Slug
Diaphragm
Effective diameter
258
mm
Effective area
SD
522
cm²
Moving mass
MMS
56
g
Moving mass (without air load)
MMD
47.4
g
Suspensions
Stiffness
KMS
5.65
N/mm
Compliance
CMS
177
µm/N
Equivalent volume to the compliance
VAS
69
L
Mechanical resistance
RMS
4.63
N·s/m
Dimensions
Nominal diameter
12
″
320
mm
Overall diameter
315
mm
Baffle cutout diameter
283
mm
Overall depth
141
mm
Flange thickness
14
mm
Mounting depth
127
mm
Volume occupied by the driver
2.5
L
Net weight
3.9
kg
Similar woofers to B&C Speaker 12NDL76
12″Woofer
fS
49 Hz
SD
530 cm²
50 - 3000 Hz
QTS
0.26
xmax
7.0 mm
SPL1W
96 dB
Bl/√RE
8.17
Pmax
1000 W
12″Subwoofer
fS
50 Hz
SD
540 cm²
50 - 4000 Hz
QTS
0.27
xmax
7.0 mm
SPL1W
96 dB
Bl/√RE
8.42
Pmax
1200 W
12″Low frequency
fS
49 Hz
SD
531 cm²
45 - 4000 Hz
QTS
0.29
xmax
4.8 mm
SPL1W
96 dB
Bl/√RE
7.88
Pmax
1400 W