8″ / 200 mm
Nominal diameter
76 Hz
Resonance
0.25
Q factor
95 dB
Sensitivity
± 6 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
Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.5
dB
Frequency response
70 - 3000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
76.0
Hz
Mechanical quality factor
QMS
5.30
Electrical quality factor
QES
0.26
Total quality factor
QTS
0.25
Large signal parameters
Maximum linear excursion
xmax
6.0
mm
Air volume displaced at xmax
VD
132
cm³
Power handling
P
200
W
Program power
Pmax
400
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
2.5
Ω
Inductance (1kHz)
LE
0.2
mH
VC Diameter
51
mm
Winding height
HVC
16
mm
Former material
Glass Fibre
Magnet
Flux density
B
1.3
T
Force factor
Bl
11.2
N/A
Motor constant
Bl/√RE
7.08
N/√W
Air gap height
HAG
10
mm
Diaphragm
Effective diameter
167
mm
Effective area
SD
220
cm²
Moving mass
MMS
27
g
Moving mass (without air load)
MMD
24.5
g
Material
Waterproof Both Sides
Suspensions
Stiffness
KMS
6.21
N/mm
Compliance
CMS
161
µm/N
Equivalent volume to the compliance
VAS
10.6
L
Mechanical resistance
RMS
2.43
N·s/m
Dimensions
Nominal diameter
8
″
200
mm
Overall diameter
225
mm
Baffle cutout diameter
187
mm
Overall depth
100
mm
Flange thickness
11
mm
Mounting depth
89
mm
Volume occupied by the driver
1.1
L
Net weight
3.05
kg
Similar woofers to B&C Speaker 8NW51
8″Mid Bass
fS
73 Hz
SD
220 cm²
80 - 4000 Hz
QTS
0.24
xmax
4.5 mm
SPL1W
95 dB
Bl/√RE
7.17
Pmax
700 W
8″Mid Bass
fS
80 Hz
SD
220 cm²
80 - 4000 Hz
QTS
0.25
xmax
4.5 mm
SPL1W
95 dB
Bl/√RE
7.53
Pmax
700 W
8″Mid-range
fS
76 Hz
SD
190 cm²
50 - 6000 Hz
QTS
0.26
xmax
3.0 mm
SPL1W
95 dB
Bl/√RE
5.99
Pmax
400 W