Purifi Audio PTT4.0X04-NAC-03

The PTT4.0X04-NFC-01 is a 4" (10 cm) midrange speaker from the renowned manufacturer Purifi Audio. Despite its compact size, this woofer/midrange speaker impresses with its high power handling and excellent performance in the midrange range. Its low distortion across 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 speaker represents the quintessence of precision and professionalism.

• Compact but no less impressive
• Natural surround from PURIFI
• Extremely low distortion over the entire deflection range
• Developed and manufactured in Denmark
• Excellent midrange performance
• High resilience
• High linear deflection limit with constant force factor

• Type: Extended woofer
  
• Size: 4 inches
  
• Nominal impedance: 4 Ω
  
• Membrane material: Black anodized aluminum
  
• Linear displacement, 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
  
• Rated noise power, 100 h 60 W
  
• Electrical and acoustic parameters
  
• DC resistance 3.8 Ω
  
• Minimum impedance above 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 1W/1m, 300-800Hz 81.3dB
  
• Thiele/Small parameters
  
• resonance frequency, fs 40 Hz
  
• Mechanical Q-factor, Qms 3.8
  
• Electrical Q-factor, Qes 0.34
  
• overall 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 votes
  
• Typical corner frequency, sealed B2 alignment 91.2 Hz
  
• Box volume, sealed B2 orientation 1.3 l
  
• Typical corner frequency, bass reflex PTT alignment 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 bass reflex channel, PTT alignment 50.3 cm
  
• Typical corner 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 the voice coil 21.6 mm
  
• layers of the voice coil 4
  
• Height of the air gap 4.0 mm
  
• winding material aluminum
  
• Physical dimensions
  
• Diameter of the basket 125 mm
  
• diameter of the cutout 101 mm
  
• diameter of the mounting hole pattern 115 mm
  
• mounting hole diameter 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