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

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

        €299,95

        8 In stock

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

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        Brand: PURIFI
        Show all Bass-mid woofer
        4" | 4 Ω
        PTT4.0X04-NFC-01 4″ Ultra Low Distortion Long Stroke Driver
        PTT4.0X04-NFC-01 4″ Ultra Low Distortion Long Stroke Driver
        PTT4.0X04-NFC-01 4″ Ultra Low Distortion Long Stroke Driver
        PTT4.0X04-NFC-01 4″ Ultra Low Distortion Long Stroke Driver
        PTT4.0X04-NFC-01 4″ Ultra Low Distortion Long Stroke Driver
        PTT4.0X04-NFC-01 4″ Ultra Low Distortion Long Stroke Driver
        € 247,89€ 299,95 8 In stock
        • -10% Purchase 4 for only € 269,96 per piece
        • -15% Purchase 6 for only € 254,96 per piece
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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
        PTT4.0X04-NFC-01 4″ Ultra Low Distortion Long Stroke Driver
        PTT4.0X04-NFC-01 4″ Ultra Low Distortion Long Stroke Driver
        PTT4.0X04-NFC-01 4″ Ultra Low Distortion Long Stroke Driver
        PTT4.0X04-NFC-01 4″ Ultra Low Distortion Long Stroke Driver

        Product description PURIFI PTT4.0X04-NFC-01 Bass-mid Woofer

        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. 

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        Specifications

        Article number
        PTT4.0X04-NFC-01
        EAN
        0691046950062
        Woofer Type
        Bass-midwoofer
        Nominal Diameter
        4"
        Power Handling (RMS)
        200 watts
        Power Handling (max)
        -
        Continuous Program Power
        60 watts
        Impedance (Z)
        4 ohms
        Sensitivity (SPL at 1m / 2.83V)
        84.5 dB
        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)
        -
        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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        Reviews

        1 reviews
        Review this product
        5 of 5
        PURIFI is een jong bedrijf dat extreem goed presterende luidsprekerunits en versterkermodules ontwikkeld en vervaardigd. Jongens... let een beetje op de grammatica.... dit staat zo stom...
        By Theo Noordewier on 26 October 2021
        PTT4.0X04-NFC-01 4″ Ultra Low Distortion Long Stroke Driver
        € 247,89
        € 299,95
        PTT4.0X04-NFC-01 4″ Ultra Low Distortion Long Stroke Driver
        PTT4.0X04-NFC-01 (PTT4.0W04)
        8 In stock
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