PURIFI PTT4.0M04-NAC-03

4Ω
8Ω

Mid-range

Nominal diameter4″ / 125 mm
Resonance48 Hz
Q factor0.28
Sensitivity84.4 dB
Linear excursion± 2.9 mm
PURIFI PTT4.0M04-NAC-03 Mid-rangePURIFI PTT4.0M04-NAC-03 Mid-rangePURIFI PTT4.0M04-NAC-03 Mid-range
Impedance
Excursion
Velocity
SPL
Phase
Group delay
Step response
Tone Burst
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

Specifications

  • Sensitivity (1W, 1m, infinite baffle) SPL1W 84.4dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 48Hz
  • Mechanical quality factor QMS 4.20
  • Electrical quality factor QES 0.30
  • Total quality factor QTS 0.28

Large signal parameters

  • Maximum linear excursion (one way) xmax 2.9mm
  • Maximum excursion before damage xlim 6.9mm
  • Air volume displaced at xmax VD 16cm³

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 3.4Ω
  • Inductance (1kHz) LE 0.26mH
  • VC Diameter 30mm
  • Winding height HVC 9.9mm
  • Winding material Copper Clad Aluminum

Magnet

  • Force factor Bl 5.9N/A
  • Motor constant Bl/√RE 3.2N/√W
  • Air gap height HAG 4mm
  • Diameter 90mm

Diaphragm

  • Effective diameter 85mm
  • Effective area SD 56.7cm²
  • Moving mass MMS 10.1g
  • Moving mass (without air load) MMD 9.8g
  • Material Black Anodized Aluminum

Suspensions

  • Stiffness KMS 0.917N/mm
  • Compliance CMS 1090µm/N
  • Equivalent volume to the compliance VAS 5L
  • Mechanical resistance RMS 0.72N·s/m

Dimensions

  • Nominal diameter 4″
  • 125mm
  • Overall diameter 125mm
  • Baffle cutout diameter 101mm
  • Overall depth 78mm
  • Flange thickness 4mm
  • Mounting depth 74mm
  • Volume occupied by the driver 0.23L
  • Net weight 1.25kg
Impedance
SPL
Force factor
PURIFI PTT4.0M04-NAC-03 Impedance
PURIFI PTT4.0M04-NAC-03 SPL
PURIFI PTT4.0M04-NAC-03 Force factor
PURIFI PTT4.0M04-NAC-03 Dimensions
PDF fileDatasheet

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