Beyma 6MI90

Mid-range

6.5″ / 165 mm
Nominal diameter
134 Hz
Resonance
0.42
Q factor
95 dB
Sensitivity
± 2.5 mm
Linear excursion
250 W
Program Power
Discontinued
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
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Specifications

Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.8
dB
Frequency response
140 - 8000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
134
Hz
Mechanical quality factor
QMS
8.40
Electrical quality factor
QES
0.44
Total quality factor
QTS
0.42

Large signal parameters

Maximum linear excursion
xmax
2.5
mm
Air volume displaced at xmax
VD
35
cm³
Power handling
P
125
W
Program power
Pmax
250
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.7
Ω
Inductance (1kHz)
LE
0.4
mH
VC Diameter
38
mm
Winding height
HVC
7.5
mm

Magnet

Force factor
Bl
11.3
N/A
Motor constant
Bl/√RE
4.73
N/√W
Air gap height
HAG
6
mm
Material
Ferrite

Diaphragm

Effective diameter
134
mm
Effective area
SD
140
cm²
Moving mass
MMS
11
g
Moving mass (without air load)
MMD
9.8
g

Suspensions

Stiffness
KMS
8.26
N/mm
Compliance
CMS
121
µm/N
Equivalent volume to the compliance
VAS
3.35
L
Mechanical resistance
RMS
1.16
N·s/m

Dimensions

Nominal diameter
6.5
165
mm
Volume occupied by the driver (estimated)
0.91
L
Net weight
2.2
kg
Beyma 6MI90 Impedance
Beyma 6MI90 SPL & Distortion
Beyma 6MI90 Dimensions

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