6.5″ / 180 mm
Nominal diameter
65 Hz
Resonance
0.71
Q factor
89 dB
Sensitivity
± 3 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
Sensitivity (1w, 1m, infinite baffle)
SPL1W
88.6
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
65.0
Hz
Mechanical quality factor
QMS
5.24
Electrical quality factor
QES
0.82
Total quality factor
QTS
0.71
Large signal parameters
Maximum linear excursion
xmax
3.0
mm
Maximum excursion before damage
xlim
14.5
mm
Air volume displaced at xmax
VD
46
cm³
Power handling
P
120
W
Program power
Pmax
250
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.0
Ω
Inductance (1kHz)
LE
0.22
mH
VC Diameter
37
mm
Winding height
HVC
10.9
mm
Magnet
Force factor
Bl
6.5
N/A
Motor constant
Bl/√RE
2.65
N/√W
Air gap height
HAG
5
mm
Diaphragm
Effective diameter
138
mm
Effective area
SD
154
cm²
Moving mass
MMS
14.2
g
Moving mass (without air load)
MMD
12.8
g
Suspensions
Stiffness
KMS
2.38
N/mm
Compliance
CMS
420
µm/N
Equivalent volume to the compliance
VAS
14
L
Mechanical resistance
RMS
1.11
N·s/m
Surround material
Coated Foam
Dimensions
Nominal diameter
6.5
″
180
mm
Volume occupied by the driver (estimated)
0.69
L
Net weight
1.7
kg
Similar speaker drivers to Scan-Speak 18M/8631T00
6.5″2 way
fS
65 Hz
SD
139 cm²
60 - 22000 Hz
QTS
0.78
xmax
2.5 mm
SPL1W
88 dB
Bl/√RE
2.37
Pmax
120 W
6.5″2 Way Kit
fS
67 Hz
SD
142 cm²
50 - 23000 Hz
QTS
0.81
xmax
2.0 mm
SPL1W
89 dB
Bl/√RE
2.31
Pmax
160 W
6.5″Mid-range
fS
65 Hz
SD
154 cm²
QTS
0.60
xmax
3.0 mm
SPL1W
89 dB
Bl/√RE
2.99
Pmax
250 W