Beyma 8NMFW
Subwoofer
8″ / 200 mm
Nominal diameter
37 Hz
Resonance
0.34
Q factor
88 dB
Sensitivity
± 9 mm
Linear excursion
400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
87.8
dB
Frequency response
30 - 2500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
37.0
Hz
Mechanical quality factor
QMS
7.60
Electrical quality factor
QES
0.36
Total quality factor
QTS
0.34
Large signal parameters
Maximum linear excursion
xmax
9.0
mm
Maximum excursion before damage
xlim
43.0
mm
Air volume displaced at xmax
VD
204
cm³
Power handling
P
200
W
Program power
Pmax
400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.7
Ω
Inductance (1kHz)
LE
1.1
mH
VC Diameter
51
mm
Winding height
HVC
20
mm
Magnet
Force factor
Bl
13.4
N/A
Motor constant
Bl/√RE
5.61
N/√W
Air gap height
HAG
6
mm
Diaphragm
Effective diameter
170
mm
Effective area
SD
227
cm²
Moving mass
MMS
48
g
Moving mass (without air load)
MMD
45.4
g
Suspensions
Stiffness
KMS
2.66
N/mm
Compliance
CMS
376
µm/N
Equivalent volume to the compliance
VAS
27
L
Mechanical resistance
RMS
1.5
N·s/m
Dimensions
Nominal diameter
8
″
200
mm
Overall diameter
227
mm
Baffle cutout diameter
181
mm
Overall depth
137
mm
Volume occupied by the driver (estimated)
1.5
L
Net weight
3.7
kg
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SpeakerbenchSimilar subwoofers to Beyma 8NMFW
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8″Woofer
fS
35 Hz
SD
211 cm²
35 - 7000 Hz
QTS
0.33
xmax
5.5 mm
SPL1W
88 dB
Bl/√RE
4.36
Pmax
160 W
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