Beyma 6NMFW

Subwoofer

6.5″ / 165 mm
Nominal diameter
40 Hz
Resonance
0.33
Q factor
85 dB
Sensitivity
± 9 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
Sensitivity (1W, 1m, infinite baffle)
SPL1W
85.3
dB
Frequency response
35 - 3000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
40.0
Hz
Mechanical quality factor
QMS
7.50
Electrical quality factor
QES
0.35
Total quality factor
QTS
0.33

Large signal parameters

Maximum linear excursion
xmax
9.0
mm
Maximum excursion before damage
xlim
43.0
mm
Air volume displaced at xmax
VD
139
cm³
Power handling
P
200
W
Program power
Pmax
400
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.8
Ω
Inductance (1kHz)
LE
0.95
mH
VC Diameter
51
mm
Winding height
HVC
20
mm

Magnet

Force factor
Bl
14.0
N/A
Motor constant
Bl/√RE
5.81
N/√W
Air gap height
HAG
6
mm

Diaphragm

Effective diameter
140
mm
Effective area
SD
154
cm²
Moving mass
MMS
45
g
Moving mass (without air load)
MMD
43.6
g

Suspensions

Stiffness
KMS
2.92
N/mm
Compliance
CMS
342
µm/N
Equivalent volume to the compliance
VAS
11
L
Mechanical resistance
RMS
1.52
N·s/m

Dimensions

Nominal diameter
6.5
165
mm
Overall diameter
176
mm
Baffle cutout diameter
158
mm
Overall depth
121
mm
Volume occupied by the driver (estimated)
1.2
L
Net weight
3.5
kg
Beyma 6NMFW SPL & Impedance
Beyma 6NMFW Dimensions

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