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.

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Highlights

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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

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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.

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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.

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Specifications

Article number PTT4.0X04-NFC-01

Woofer Series -

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 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) -

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 -