B&C Speaker 8NDL51

16Ω

Woofer

8″ / 200 mm
Nominal diameter
70 Hz
Resonance
0.47
Q factor
91 dB
Sensitivity
± 7 mm
Linear excursion
400 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

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Specifications

Sensitivity (1W, 1m, infinite baffle)
SPL1W
91.3
dB
Frequency response
70 - 3000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
70.0
Hz
Mechanical quality factor
QMS
5.88
Electrical quality factor
QES
0.51
Total quality factor
QTS
0.47

Large signal parameters

Maximum linear excursion
xmax
7.0
mm
Air volume displaced at xmax
VD
154
cm³
Power handling
P
200
W
Program power
Pmax
400
W

Voice Coil

Nominal impedance
Z
16
Ω
DC resistance
RE
10.6
Ω
Inductance (1kHz)
LE
0.6
mH
VC Diameter
51
mm
Winding height
HVC
17
mm
Winding material
Copper
Former material
Glass Fibre

Magnet

Flux density
B
1.05
T
Force factor
Bl
15.2
N/A
Motor constant
Bl/√RE
4.67
N/√W
Air gap height
HAG
8
mm
Material
Neodymium Inside Slug

Diaphragm

Effective diameter
167
mm
Effective area
SD
220
cm²
Moving mass
MMS
26
g
Moving mass (without air load)
MMD
23.5
g
Material
Waterproof Both Sides

Suspensions

Stiffness
KMS
4.88
N/mm
Compliance
CMS
205
µm/N
Equivalent volume to the compliance
VAS
13.4
L
Mechanical resistance
RMS
1.94
N·s/m

Dimensions

Nominal diameter
8
200
mm
Overall diameter
225
mm
Baffle cutout diameter
187
mm
Overall depth
90
mm
Flange thickness
11
mm
Mounting depth
79
mm
Volume occupied by the driver
1.1
L
Net weight
1.85
kg
B&C Speaker 8NDL51 Impedance
B&C Speaker 8NDL51 SPL
B&C Speaker 8NDL51 Dimensions

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8Woofer
fS
69 Hz
SD
220 cm²
70 - 5000 Hz
QTS
0.41
xmax
6.5 mm
SPL1W
91 dB
Bl/√RE
5.31
Pmax
400 W