12″ / 320 mm
Nominal diameter
51 Hz
Resonance
0.27
Q factor
95 dB
Sensitivity
± 8 mm
Linear excursion
1400 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
95.1
dB
Frequency response
50 - 3000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
51.0
Hz
Mechanical quality factor
QMS
5.00
Electrical quality factor
QES
0.29
Total quality factor
QTS
0.27
Large signal parameters
Maximum linear excursion
xmax
8.0
mm
Air volume displaced at xmax
VD
418
cm³
Power handling
P
700
W
Program power
Pmax
1400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.0
Ω
Inductance (1kHz)
LE
1.3
mH
VC Diameter
88
mm
Winding height
HVC
21
mm
Winding material
Aluminium
Former material
Glass Fibre
Magnet
Flux density
B
1.05
T
Force factor
Bl
19.9
N/A
Motor constant
Bl/√RE
8.9
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
71
g
Moving mass (without air load)
MMD
62.4
g
Material
Waterproof Front Side
Suspensions
Stiffness
KMS
7.35
N/mm
Compliance
CMS
136
µm/N
Equivalent volume to the compliance
VAS
52
L
Mechanical resistance
RMS
4.55
N·s/m
Dimensions
Nominal diameter
12
″
320
mm
Overall diameter
315
mm
Baffle cutout diameter
282
mm
Overall depth
140
mm
Flange thickness
13
mm
Mounting depth
127
mm
Volume occupied by the driver
2.5
L
Net weight
4.95
kg
Similar woofers to B&C Speaker 12NDL88
12″Woofer
fS
48 Hz
SD
522 cm²
50 - 3000 Hz
QTS
0.24
xmax
8.0 mm
SPL1W
95 dB
Bl/√RE
9.43
Pmax
1400 W
12″Woofer
fS
53 Hz
SD
531 cm²
50 - 3000 Hz
QTS
0.30
xmax
5.8 mm
SPL1W
95 dB
Bl/√RE
8.43
Pmax
900 W
12″Subwoofer
fS
52 Hz
SD
531 cm²
46 - 4200 Hz
QTS
0.29
xmax
6.5 mm
SPL1W
95 dB
Bl/√RE
9.0
Pmax
800 W