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Purifi

PURIFI - 4" Woofer - PTT4.0X04-NFC-01

PURIFI - 4" Woofer - PTT4.0X04-NFC-01

Regular price $699.95 AUD
Regular price Sale price $699.95 AUD
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***CURRENTLY, ALL PURIFI DRIVERS ARE MADE TO ORDER WITH EXPECTED DELIVERY WITHIN 8-12 WEEKS***

Description:

The 4” long-stroke driver incorporates the easily recognizable PURIFI NeutralSurround suspension and ultra-linear motor system PURIFI PureDrive technology working in concert to elevate performance to a whole new level despite of it’s compact size.

Features:

  • Vibroacoustic optimized cone and dust cap in proprietary paper fiber mix
  • Negligible Force Factor Modulation (FFM) and Surround Radiation Distortion (SRD)
  • Low Magnetic Hysteresis Distortion (MHD)
  • "Real" long-stroke performance with distortion remaining low over full excursion
  • Uncompromised midrange performance
  • Designed and manufactured in Denmark

Specifications:

General Specifications
Type Extended Woofer
Size 4in
Nominal impedance
Cone material Proprietary Fiber Mix
Linear excursion, Xlin ±8.8mm
Maximum mechanical excursion, Xmax ±13.7mm
Motor efficiency factor, Beta 9.5 (N/A)^2/Ω
Efficiency Bandwidth Product, EBP 126.7Hz
Long term maximum power 200W
Rated noise power, 100h 60W
Electrical & Acoustical Parameter
DC resistance 3.8Ω
Minimum impedance above resonance, Zmin 4.3Ω
Frequency for minimum impedance, fmin 262Hz
Maximum impedance, Zo 58Ω
Voice Coil inductance @ 1kHz 0mm, Le 0.38mH
SPL @ 2.83Vrms/1m, 300-800Hz 84.5dB
SPL @ 1W/1m, 300-800Hz 81.8dB
Thiele/Small Parameters
Resonance frequency, fs 38Hz
Mechanical Q factor, Qms 4.5
Electrical Q factor, Qes 0.32
Total Q factor, Qts 0.3
Equivalent volume, Vas 6.4L
Effective piston area, Sd 56.7cm2
Effective piston diameter, D 8.5cm
Force factor, Bl 6.0N/A
Mechanical resistance, Rms 0.66kg/s
Moving mass, Mms 12.8g
Suspension compliance, Cms 1.41mm/N
Typical Box Tunings
Typical corner frequency, sealed B2 alignment 89.6Hz
Box volume, sealed B2 alignment 1.4L
Typical corner frequency, bass reflex PTT alignment 46.8Hz
Box resonance, bass reflex PTT alignment 49.7Hz
Box volume, bass reflex PTT alignment 3.9L
Port diameter, bass reflex PTT alignment 4.5cm
Port length, bass reflex PTT alignment 48.4cm
Typical corner frequency, 2xPR PTT alignment 51.0Hz
Box volume, 2xPR PTT alignment 3.3L
PR mass per PR, 2xPR PTT alignment 31.9g
Voice Coil Properties
Voice Coil diameter 30mm
Voice Coil length 21.6mm
Voice Coil layers 4
Airgap height 4.0mm
Winding material Alu
Physical Dimensions
Basket diameter 125mm
Cutout diameter 101mm
Mounting hole pattern diameter 115mm
Mounting hole diameter 4.2mm
Magnet diameter 90mm
Outer flange height 3.6mm
Build-in depth 73.5mm
Weight 1.25kg
Internal volume displacement 0.23L
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