Hertz Cento C 165 F

Woofer

6.5″ / 165 mm
Nominal diameter
80 Hz
Resonance
0.8
Q factor
88 dB
Sensitivity
± 3.2 mm
Linear excursion
180 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
88.4
dB
Frequency response
65 - 5000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
80.0
Hz
Mechanical quality factor
QMS
3.40
Electrical quality factor
QES
1.00
Total quality factor
QTS
0.80

Large signal parameters

Maximum linear excursion
xmax
3.2
mm
Maximum excursion before damage
xlim
3.5
mm
Air volume displaced at xmax
VD
45
cm³
Power handling
P
70
W
Program power
Pmax
180
W

Voice Coil

Nominal impedance
Z
4
Ω
DC resistance
RE
2.7
Ω
Inductance (1kHz)
LE
0.15
mH
VC Diameter
25
mm

Magnet

Force factor
Bl
3.9
N/A
Motor constant
Bl/√RE
2.37
N/√W
Diameter
90
mm
Height
10
mm
Material
Ferrite

Diaphragm

Effective diameter
134
mm
Effective area
SD
142
cm²
Moving mass
MMS
12
g
Moving mass (without air load)
MMD
10.8
g
Material
Semi-Pressed paper with Mica

Suspensions

Stiffness
KMS
3.03
N/mm
Compliance
CMS
330
µm/N
Equivalent volume to the compliance
VAS
9.4
L
Mechanical resistance
RMS
1.77
N·s/m

Dimensions

Nominal diameter
6.5
165
mm
Overall diameter
165
mm
Baffle cutout diameter
141
mm
Overall depth
51
mm
Flange thickness
7
mm
Mounting depth
44
mm
Volume occupied by the driver (estimated)
0.23
L
Net weight
0.72
kg
Hertz C 165 F SPL & Impedance

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