Hertz CPX 165 PRO

2 Way

Nominal diameter6.5″ / 165 mm
Resonance60 Hz
Q factor0.55
Sensitivity87.7 dB
Linear excursion± 3.9 mm
Program Power285 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 87.7dB
  • Frequency response 45 - 22000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 60Hz
  • Mechanical quality factor QMS 4.10
  • Electrical quality factor QES 0.64
  • Total quality factor QTS 0.55

Large signal parameters

  • Maximum linear excursion xmax 3.9mm
  • Air volume displaced at xmax VD 52cm³
  • Power handling P 95W
  • Program power Pmax 285W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 3.3Ω
  • Inductance (1kHz) LE 0.29mH
  • VC Diameter 25mm

Magnet

  • Force factor Bl 5.3N/A
  • Motor constant Bl/√RE 2.92N/√W
  • Material High density flux ferrite

Diaphragm

  • Effective diameter 132mm
  • Effective area SD 133cm²
  • Moving mass MMS 14.6g
  • Moving mass (without air load) MMD 13.5g
  • Material Pressed-paper cone

Suspensions

  • Stiffness KMS 2.13N/mm
  • Compliance CMS 470µm/N
  • Equivalent volume to the compliance VAS 11.8L
  • Mechanical resistance RMS 1.34N·s/m

Dimensions

  • Nominal diameter 6.5
  • 165mm
  • Volume occupied by the driver (estimated) 0.5L
Hertz CPX 165 PRO SPL & Impedance


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