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PTT4.0M04-NFC-01

https://ptt.purifi-audio.com/web/image/product.template/1857/image_1920?unique=cebf7c8

4" Ultra Low Distortion Midrange

DKK 1,725.00 1725.0 DKK DKK 1,725.00 Tax Excluded

OEM Only

  • Type
  • Size
  • Nominal impedance
  • Cone material
  • Linear excursion, Xlin
  • Maximum mechanical excursion, Xmax
  • Motor efficiency factor, Beta
  • Efficiency Bandwidth Product, EBP
  • Long term maximum power
  • Rated noise power, 100h
  • DC resistance
  • Minimum impedance above resonance, Zmin
  • Frequency for minimum impedance, fmin
  • Maximum impedance, Zo
  • Voice Coil inductance @ 1kHz 0mm, Le
  • SPL @ 2.83Vrms/1m, 1000-2800Hz
  • SPL @ 1W/1m, 1000-2800Hz
  • Resonance frequency, fs
  • Mechanical Q factor, Qms
  • Electrical Q factor, Qes
  • Total Q factor, Qts
  • Equivalent volume, Vas
  • Effective piston area, Sd
  • Effective piston diameter, D
  • Force factor, Bl
  • Mechanical resistance, Rms
  • Moving mass, Mms
  • Suspension compliance, Cms
  • Typical corner frequency, sealed B2 alignment
  • Box volume, sealed B2 alignment
  • Voice Coil diameter
  • Voice Coil length
  • Voice Coil layers
  • Airgap height
  • Winding material
  • Basket diameter
  • Cutout diameter
  • Mounting hole pattern diameter
  • Mounting hole diameter
  • Magnet diameter
  • Outer flange height
  • Build-in depth
  • Weight
  • Internal volume displacement

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Payment fees (e.g. Stripe fees) are not refundable 
All transducers are made-to-order
Expect 8-12 weeks of delivery time   
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Description

The 4” midrange driver has been optimized for higher sensitivity compared to the long stroke version. It 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.

The PTT4.0M04-NFC-01 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)
  • Dedicated midrange driver with enhanced efficiency
  • Designed and manufactured in Denmark


Specifications

General Specifications
Type Midrange
Size 4in
Nominal impedance 4Ω
Cone material Proprietary Fiber Mix
Linear excursion, Xlin ±2.9mm
Maximum mechanical excursion, Xmax ±13.7mm
Motor efficiency factor, Beta 10.6 (N*A)^2/Ω
Efficiency Bandwidth Product, EBP 184.0Hz
Long term maximum power TBD
Rated noise power, 100h TBD
Electrical & Acoustical Parameter
DC resistance 3.4Ω
Minimum impedance above resonance, Zmin 3.7Ω
Frequency for minimum impedance, fmin 405Hz
Maximum impedance, Zo 62Ω
Voice Coil inductance @ 1kHz 0mm, Le 0.26mH
SPL @ 2.83Vrms/1m, 1000-2800Hz 87.4dB
SPL @ 1W/1m, 1000-2800Hz 84.0dB
Thiele/Small Paramters
Resonance frequency, fs 46Hz
Mechanical Q factor, Qms 4.6
Electrical Q factor, Qes 0.27
Total Q factor, Qts 0.25
Equivalent volume, Vas 5.4L
Effective piston area, Sd 56.7cm2
Effective piston diameter, D 8.5cm
Force factor, Bl 6.0N/A
Mechanical resistance, Rms 0.62kg/s
Moving mass, Mms 9.9g
Suspension compliance, Cms 1.18mm/N
Typical Box Tunings
Typical corner frequency, sealed B2 alignment 130.1Hz
Box volume, sealed B2 alignment 0.8L
Voice Coil Properties
Voice Coil diameter 30mm
Voice Coil length 9.9mm
Voice Coil layers 4
Airgap height 4.0mm
Winding material CCAW
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