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The PTT4.0PR is a 4” high-performance passive radiator featuring PURIFI ’s research based technologies, including the Natural Surround and a cone made from a proprietary fibre mix.
Highlights:
A whole new take on passive radiator design
PURIFI ’s Natural Surround
Bimax spider
High linear excursion limit
Tunable mass
Engineered and manufactured in Denmark
Product Details:
PURIFI PTT4.0PR Passive Radiator
PURIFI is a fresh company that designs and manufactures extreme high performance transducers and amplifier modules. Don’t let the 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 passive radiators from PURIFI are the most high-end passive radiators available at SoundImports.
The challenge
Loudspeaker drivers are known to add a large, if not the largest, amount of distortion on 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 passive radiator design
PURIFI developed mathematical models for the suspension, cone and surround. These models allowed for the optimization of different distortion mechanism separately. The result makes that the PTT6.5PR is a perfect passive radiator to accompany the PTT4.0W04 in a size efficient enclosure. Looking for a passive radiator the accompany the larger PTT6.5W04 or PTT6.5W08? Take a look at the PTT6.5PR
Specifications:
Woofer Type: Passive radiator
Nominal Diameter: 4"
Power Handling (RMS): -
Power Handling (max): -
Continuous Program Power: -
Impedance (Z): -
Sensitivity (SPL at 1m / 2.83V): 0 dB
Frequency Response: -
Voice Coil Diameter: -
Magnet Weight: -
DC Resistance (Re): -
Voice Coil Inductance (Le) -
Resonant Frequency (Fs): 24 Hz
Mechanical Q (Qms): 7.0
Electromagnetic Q (Qes): -
Diaphragm Mass Inc. Airload (Mms): 30g
Moving Mass Of Diaphragm (Mmd): -
Mechanical Compliance of Suspension (Cms): 1.41 mm/N
Surface Area of Cone (Sd): 57 cm²
Volume of Displacement (Vd): 79.8 cm³
BL Product (BL): -
Compliance Equivalent Volume (Vas): 6.4 liter
Maximum Linear Excursion (Xmax): 14 mm
Driver's Mechanical Losses (Rms): -
Cone / Diaphragm Material: Proprietary Fibre Mix
Surround Material: Nitrile rubber
Voice Coil Wire Material: -
Voice Coil Former: -
Dual Voice Coil: -
Basket / Frame Material: Aluminum alloy diecast
Magnet Material: -
Shielded: -
Overall Outside Diameter: 125 mm
Overall Depth: 39.5 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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