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PURIFI PTT4.0X04-NFC-01 4″ Ultra Low Distortion Long Stroke Driver

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  • Article code: PTT4.0X04-NFC-01
  • Stock: >10 In stock

The PURIFI PTT4.0X04-NFC-01 is the smaller sibling of the PTT6.5. Don’t let the small size fool you! Thanks to state of the art technology this is probably the most potent and well performing 4” bass-midwoofer around.

€ 299,95 Incl. 21% VAT

  • Buy 4 for €269,96 each and save 10% Sale 10%
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Product description

PURIFI PTT4.0X04-NFC-01 4″ Ultra Low Distortion Long Stroke Driver

The PURIFI PTT4.0X04-NFC-01 is the smaller sibling of the PTT6.5W. Don’t let the small size fool you! Thanks to state of the art technology this is probably the most potent and well performing 4” bass-midwoofer around.

 

Highlights

  • Compact but no less impressive
  • PURIFI ’s Natural Surround
  • Extreme low distortion over full excursion range 
  • Engineered and manufactured in Denmark
  • Excellent midrange performance
  • High power handling
  • High linear excursion limit with constant force factor

 

Product Details

PURIFI PTT4.0X04-NFC-01 bass-midwoofer 

 

PURIFI is a fresh company that designs and manufactures extreme high performance transducers and amplifier modules. Don’t let their freshness fool you; Their leadership team consists out of some well-respected audio technology pioneers. PURIFI developed a deep understanding of many performance degrading aspects for both amplifiers and transducers. Thanks to this understanding the PTT4.0X04-NFC-01 is the most potent 4” bass-mid woofer from our woofer category.

 

The challenge 

Loudspeaker drivers are known to add a large, if not the largest, amount of distortion in an audio signal chain. Reducing this distortion is a challenge with the complication of fine-tuning to improve one part (e.g. harmonic distortion) often results in a degradation of  another part (e.g. intermodulation distortion). These distortions consist out of several separate distortion mechanisms. By carefully mapping and completely understanding these mechanisms, PURIFI succeeded in improving the overall performance by a large degree.

 

A whole new take on driver design

PURIFI developed mathematical models for the motor system, suspension, dome and surround. These models allowed for optimization of each distortion mechanism separately. This systematic approach reduced all distortions mechanisms and keeps intermodulation distortion low. The result makes that the PTT4.0X04-NFC-01 is a compact 4” driver with unparalleled performance. This small driver is really up to big sound.

 

The mechanism

Improvement

Low force factor modulation

Current through the voice coil is not distorted by cone movement. Gives undistorted midrange regardless of excursion

Constant force factor over excursion - Bl(x)

Prevents amplitude devotions of midrange output during large excursion (sometimes called ‘burbling’)

Low surround radiation distortion

Reduces harmonic and intermodulation distortion caused by surround

Low magnetic hysteria distortion

Reduces harmonic and intermodulation distortion caused by magnetic traces left by previous cycle

 

FAQ 

Q: Why is this surround odd shaped?

A: This is the PURIFI Natural Surround. Conventional surrounds create distortion as they deform. The shape of the Natural Surround reduces cone edge resonances and distortion. It might be odd looking, but form follows function here. A more detailed look shows that the surround actually represents complex sound wave. We have been told that the Natural Surround is called ‘wormy’ by insiders. 

Specifications

Specifications for: PTT4.0X04-NFC-01 4″ Ultra Low Distortion Long Stroke Driver

  • Woofer Series Specific woofer production line of the manufacturer. -
  • Woofer Type The driver type for example subwoofer, mid-woofer, full range or coaxial woofer. Bass-midwoofer
  • Nominal Diameter The approximate diameter of the driver, measured in inches. 4"
  • Power Handling (RMS) The average power handling capability of a driver (coil) in electric power (watts) for a long period of time without damaging the driver. RMS stands for Root Mean Square 200 watts
  • Power Handling (max) The maximum electrical power that a woofer (coil) can handle for a short period of time before it is damaged. -
  • View all specifications
  • Continuous Program Power 60 watts
  • Impedance 4 ohms
  • Sensitivity 84.5 dB @ 2.83V/1m
  • Frequency Response -
  • Voice Coil Diameter 30 mm
  • Magnet Weight -
  • DC Resistance (Re) 3.8 ohms
  • Voice Coil Inductance (Le) 0.38 mH @ 1kHz
  • Resonant Frequency (Fs) 38 Hz
  • Mechanical Q (Qms) 4.5
  • Electromagnetic Q (Qes) 0.32
  • Total Q (Qts) 0.30
  • Diaphragm Mass Inc. Airload (Mms) 12.8g
  • Moving Mass Of Diaphragm (Mmd) -
  • Mechanical Compliance of Suspension (Cms)
  • Surface Area of Cone (Sd) 56.7 cm²
  • Volume of Displacement (Vd) 48.2 cm³
  • BL Product (BL) 6.0
  • Compliance Equivalent Volume (Vas) 6.4 liter
  • Maximum Linear Excursion (Xmax) 8.5 mm
  • Driver's Mechanical Losses (Rms) 0.66 kg/s
  • Cone / Diaphragm Material Proprietary Fibre Mix
  • Surround Material Nitrile rubber
  • Voice Coil Wire Material Aluminum
  • Voice Coil Former Fiberglass
  • Dual Voice Coil -
  • Basket / Frame Material Aluminum alloy diecast
  • Magnet Material Ferro-magnetic
  • Shielded -
  • Overall Outside Diameter 125 mm
  • Overall Depth 78.5 mm
  • Baffle Cutout Diameter 100 mm
  • Bolt Circle Diameter 115 mm
  • # Mounting Holes 6
  • Mounting Hole Diameter 4.2 mm
  • Sealed Volume -
  • Sealed F3 -
  • Vented Volume -
  • Vented F3 -

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PTT4.0X04-NFC-01 4″ Ultra Low Distortion Long Stroke Driver

PTT4.0X04-NFC-01 4″ Ultra Low Distortion Long Stroke Driver

€ 299,95

SoundImports 9,6 / 10 - 2.351 Reviews @ Kiyoh
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