Hertz Cento CX 570

2 Way

Nominal size5x7″ / 221 mm
Resonance70 Hz
Q factor0.67
Sensitivity89.2 dB
Linear excursion± 3.5 mm
Program Power140 W
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 89.2dB
  • Frequency response 55 - 22000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 70Hz
  • 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 3.5mm
  • Maximum excursion before damage xlim 4.9mm
  • Air volume displaced at xmax VD 53cm³
  • Power handling P 70W
  • Program power Pmax 140W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 3.3Ω
  • Inductance (1kHz) LE 0.2mH
  • VC Diameter 25mm

Magnet

  • Force factor Bl 4.9N/A
  • Motor constant Bl/√RE 2.7N/√W
  • Diameter 85mm
  • Material Ferrite

Diaphragm

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

Suspensions

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

Dimensions

  • Nominal size 5 x 7
  • 221mm
  • Overall diameter 221mm
  • Baffle cutout diameter 182mm
  • Overall depth 75mm
  • Flange thickness 9mm
  • Mounting depth 66mm
  • Volume occupied by the driver (estimated) 0.44L
  • Net weight 1.0kg
Hertz CX 570 SPL & Impedance


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