PURIFI PTT4.0PR - 4" Long Stroke Passive Radiator with Ultra Low Distortion

PURIFI PTT4.0PR Long Stroke Passive Radiator with Ultra Low Distortion

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

 

The mechanism

Improvement

Low surround radiation distortion

Reduces harmonic and intermodulation distortion caused by surround