Hertz Cento CX 690

3 Way

6x9″/ 238 mm
Nominal size
70 Hz
Resonance
0.67
Q factor
89 dB
Sensitivity
± 3.5 mm
Linear excursion
200 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
89.2
dB
Frequency response
40 - 23000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
70.0
Hz
Mechanical quality factor
QMS
3.30
Electrical quality factor
QES
0.83
Total quality factor
QTS
0.67

Large signal parameters

Maximum linear excursion
xmax
3.5
mm
Maximum excursion before damage
xlim
5.5
mm
Air volume displaced at xmax
VD
53
cm³
Power handling
P
100
W
Program power
Pmax
200
W

Voice Coil

Nominal impedance
Z
4
Ω
DC resistance
RE
3.3
Ω
Inductance (1kHz)
LE
0.2
mH
VC Diameter
30
mm

Magnet

Force factor
Bl
4.9
N/A
Motor constant
Bl/√RE
2.7
N/√W
Diameter
100
mm
Material
High density flux ferrite

Diaphragm

Effective diameter
139
mm
Effective area
SD
152
cm²
Moving mass
MMS
13
g
Moving mass (without air load)
MMD
11.4
g
Material
Semi-pressed paper + Mica

Suspensions

Stiffness
KMS
2.94
N/mm
Compliance
CMS
340
µm/N
Equivalent volume to the compliance
VAS
11.1
L
Mechanical resistance
RMS
1.73
N·s/m

Dimensions

Nominal size
6 x 9
238
mm
Overall diameter
238
mm
Baffle cutout diameter
224
mm
Overall depth
95
mm
Flange thickness
16
mm
Mounting depth
79
mm
Volume occupied by the driver (estimated)
0.72
L
Net weight
1.55
kg
Hertz CX 690 SPL & Impedance

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SD
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