Purifi Audio PTT4.0X04-NAC-03

Description

The PTT4.0X04-NFC-01 is a 4" (10 cm) midrange driver from the renowned manufacturer Purifi Audio. Despite its compact size, this bass-midrange driver impresses with its high power handling and excellent midrange performance. Its low distortion over the entire excursion and frequency range and the special natural surround make the PTT4.0X04-NFC-01 a technological masterpiece in the segment. Developed and manufactured in Denmark, this midrange driver represents the quintessence of precision and professionalism.

Highlights

• Compact, but no less impressive
• Natural bead from PURIFI
• Extremely low distortion over the entire deflection range
• Developed and manufactured in Denmark
• Excellent performance in the mid-range
• High load capacity
• High linear deflection limit with constant force factor

Features

• Type: Extended woofer
  
• Size: 4 inch
  
• Nominal impedance: 4 Ω
  
• Membrane material: Black anodized aluminium
  
• Linear deflection, Xlin: ±8.8 mm
  
• Maximum mechanical deflection, Xmax: ±13.7 mm
  
• Motor efficiency, beta: 9.8 (N/A)^2/Ω
  
• Efficiency bandwidth, EBP: 129.0 Hz
  
• Maximum long-term power: 200 W
  
• Nominal noise power, 100 h 60 W
  
• Electrical and acoustic parameters
  
• Direct current resistance 3.8 Ω
  
• Minimum impedance via resonance, Zmin 4.4 Ω
  
• Frequency for minimum impedance, fmin 256 Hz
  
• Maximum impedance, Zo 46 Ω
  
• Voice coil inductance at 1 kHz 0 mm, Le 0.38 mH
  
• SPL at 2.83 Vrms/1 m, 300-800 Hz 83.9 dB
  
• SPL at 1 W/1 m, 300-800 Hz 81.3 dB
  
• Thiele/Small parameters
  
• Resonant frequency, fs 40 Hz
  
• Mechanical Q-factor, Qms 3.8
  
• Electrical Q-factor, Qes 0.34
  
• Total Q-factor, Qts 0.31
  
• Equivalent volume, Vas 5.5 l
  
• Effective piston area, Sd 56.7 cm²
  
• Effective piston diameter, D 8.5 cm
  
• Force factor, Bl 6.1 N/A
  
• Mechanical resistance, Rms 0.87 kg/s
  
• Moving mass, Mms 13.0 g
  
• Suspension compliance, Cms 1.22 mm/N
  
• Typical box set-ups
  
• Typical cut-off frequency, sealed B2 orientation 91.2 Hz
  
• Box volume, sealed B2 alignment 1.3 l
  
• Typical cut-off frequency, bass reflex PTT orientation 47.3 Hz
  
• Box resonance, bass reflex PTT alignment 50.4 Hz
  
• Box volume, bass reflex PTT alignment 3.7 l
  
• Diameter of the bass reflex channel, PTT alignment 4.5 cm
  
• Length of the bass reflex channel, PTT alignment 50.3 cm
  
• Typical cut-off frequency, 2xPR PTT alignment 52.0 Hz
  
• Box volume, 2xPR PTT alignment 3.1 l
  
• PR mass per PR, 2xPR PTT alignment 32.7 g
  
• Properties of the voice coil
  
• Diameter of the voice coil 30 mm
  
• Length of voice coil 21.6 mm
  
• Layers of the voice coil 4
  
• Height of the air gap 4.0 mm
  
• Winding material aluminum
  
• Physical dimensions
  
• Basket diameter 125 mm
  
• Diameter of the cut-out 101 mm
  
• Diameter of the mounting hole pattern 115 mm
  
• Diameter of the mounting hole 4.2 mm
  
• Diameter of the magnet 90 mm
  
• Height of the outer flange 3.6 mm
  
• Installation depth 73.5 mm
  
• Weight 1.25 kg
  
• Displaced internal volume 0.23 l