6.5″ / 170 mm
Nominal diameter
55 Hz
Resonance
0.29
Q factor
90 dB
Sensitivity
± 5.5 mm
Linear excursion
300 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
Sensitivity (1w, 1m, infinite baffle)
SPL1W
89.6
dB
Frequency response
60 - 3000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
55.0
Hz
Mechanical quality factor
QMS
4.72
Electrical quality factor
QES
0.31
Total quality factor
QTS
0.29
Large signal parameters
Maximum linear excursion
xmax
5.5
mm
Air volume displaced at xmax
VD
70
cm³
Power handling
P
150
W
Program power
Pmax
300
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.6
Ω
Inductance (1kHz)
LE
0.79
mH
VC Diameter
38
mm
Winding height
HVC
14
mm
Magnet
Flux density
B
1.2
T
Force factor
Bl
10.11
N/A
Motor constant
Bl/√RE
4.27
N/√W
Air gap height
HAG
6
mm
Diaphragm
Effective diameter
127
mm
Effective area
SD
127
cm²
Moving mass
MMS
16.4
g
Moving mass (without air load)
MMD
15.2
g
Material
Paper with glassfiber
Suspensions
Stiffness
KMS
1.96
N/mm
Compliance
CMS
510
µm/N
Equivalent volume to the compliance
VAS
14.6
L
Mechanical resistance
RMS
1.2
N·s/m
Dimensions
Nominal diameter
6.5
″
170
mm
Overall diameter
185
mm
Baffle cutout diameter
145
mm
Overall depth
86
mm
Volume occupied by the driver (estimated)
0.76
L
Net weight
2.4
kg
Frame material
Die cast aluminium
Similar woofers to Oberton 6B150
6.5″Mid Bass
fS
56 Hz
SD
135 cm²
60 - 9000 Hz
QTS
0.30
xmax
5.5 mm
SPL1W
90 dB
Bl/√RE
4.56
Pmax
400 W
6″Woofer
fS
61 Hz
SD
123 cm²
60 - 5000 Hz
QTS
0.33
xmax
4.0 mm
SPL1W
89 dB
Bl/√RE
4.17
Pmax
400 W
7″Mid Bass
fS
54 Hz
SD
130 cm²
QTS
0.26
xmax
5.0 mm
SPL1W
91 dB
Bl/√RE
4.35
Pmax
240 W