PURIFI PTT5.25X08-NFA-01

4Ω
8Ω

Subwoofer

Nominal diameter5.25″ / 147 mm
Resonance32 Hz
Q factor0.27
Sensitivity83.5 dB
Linear excursion± 9.8 mm
Program Power250 W
PURIFI PTT5.25X08-NFA-01 SubwooferPURIFI PTT5.25X08-NFA-01 SubwooferPURIFI PTT5.25X08-NFA-01 Subwoofer
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 83.5dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 32Hz
  • Mechanical quality factor QMS 6.60
  • Electrical quality factor QES 0.28
  • Total quality factor QTS 0.27

Large signal parameters

  • Maximum linear excursion (one way) xmax 9.8mm
  • Maximum excursion before damage xlim 14mm
  • Air volume displaced at xmax VD 83cm³
  • Power handling P 80W
  • Program power Pmax 250W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 5.9Ω
  • Inductance (1kHz) LE 0.55mH
  • VC Diameter 39mm
  • Winding height HVC 23.6mm
  • Winding material Copper Clad Aluminum

Magnet

  • Force factor Bl 9N/A
  • Motor constant Bl/√RE 3.71N/√W
  • Air gap height HAG 4mm
  • Diameter 100mm

Diaphragm

  • Effective diameter 104mm
  • Effective area SD 84.9cm²
  • Moving mass MMS 19.6g
  • Moving mass (without air load) MMD 19g
  • Material Proprietary Fiber Mix

Suspensions

  • Stiffness KMS 0.769N/mm
  • Compliance CMS 1300µm/N
  • Equivalent volume to the compliance VAS 13.2L
  • Mechanical resistance RMS 0.59N·s/m

Dimensions

  • Nominal diameter 5.25″
  • 147mm
  • Overall diameter 147mm
  • Baffle cutout diameter 121mm
  • Overall depth 79mm
  • Flange thickness 4mm
  • Mounting depth 75mm
  • Volume occupied by the driver 0.3L
  • Net weight 1.75kg
Impedance
SPL
Force factor
PURIFI PTT5.25X08-NFA-01 Impedance
PURIFI PTT5.25X08-NFA-01 SPL
PURIFI PTT5.25X08-NFA-01 Force factor
PURIFI PTT5.25X08-NFA-01 Dimensions
PDF fileDatasheet

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