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
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
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
Similar speaker drivers to Beyma 6MI90
6.5″Mid-range
fS
124 Hz
SD
139 cm²
200 - 5000 Hz
QTS
0.38
xmax
2.3 mm
SPL1W
95 dB
Bl/√RE
4.63
Pmax
300 W
6″Mid-range
fS
135 Hz
SD
139 cm²
130 - 6000 Hz
QTS
0.35
xmax
2.0 mm
SPL1W
95 dB
Bl/√RE
4.9
Pmax
300 W
6.5″Low frequency
fS
133 Hz
SD
154 cm²
150 - 7000 Hz
QTS
0.44
xmax
4.0 mm
SPL1W
94 dB
Bl/√RE
4.39
Pmax
300 W