P.Audio 8NT-51MB
Low frequency
8″ / 203 mm
Nominal diameter
90 Hz
Resonance
0.58
Q factor
92 dB
Sensitivity
± 1.5 mm
Linear excursion
400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
91.8
dB
Frequency response
90 - 7000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
90.0
Hz
Mechanical quality factor
QMS
4.67
Electrical quality factor
QES
0.66
Total quality factor
QTS
0.58
Large signal parameters
Maximum linear excursion
xmax
1.5
mm
Air volume displaced at xmax
VD
32
cm³
Power handling
P
200
W
Program power
Pmax
400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.5
Ω
Inductance (1kHz)
LE
0.33
mH
VC Diameter
51
mm
Winding height
HVC
11
mm
Winding material
Flat aluminium wire
Former material
Kapton
Magnet
Flux density
B
1.25
T
Force factor
Bl
11.1
N/A
Motor constant
Bl/√RE
4.35
N/√W
Air gap height
HAG
8
mm
Material
Neodymium
Diaphragm
Effective diameter
170
mm
Effective area
SD
214
cm²
Moving mass
MMS
22.5
g
Moving mass (without air load)
MMD
20.1
g
Material
Waterproof Paper
Suspensions
Stiffness
KMS
7.25
N/mm
Compliance
CMS
138
µm/N
Equivalent volume to the compliance
VAS
8.95
L
Mechanical resistance
RMS
2.73
N·s/m
Surround material
Cloth
Spider material
Cotton
Dimensions
Nominal diameter
8
″
203
mm
Overall diameter
220
mm
Baffle cutout diameter
185
mm
Overall depth
110
mm
Flange thickness
14
mm
Mounting depth
96
mm
Volume occupied by the driver (estimated)
1.1
L
Frame material
Aluminium
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8″Woofer
fS
83 Hz
SD
220 cm²
85 - 4000 Hz
QTS
0.51
xmax
6.0 mm
SPL1W
92 dB
Bl/√RE
5.07
Pmax
400 W