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
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
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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 -
