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PURIFI PTT6.5M08-NFA-01 Ultra Low Distortion Midrange

€429,95

2 expected on 25-04-2025

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PURIFI PTT6.5M08-NFA-01 Ultra Low Distortion Midrange

Name: PURIFI PTT6.5M08-NFA-01 Ultra Low Distortion Midrange
Brand: PURIFI
SKU: PTT6.5M08-NFA-01
Price: 429.95 EUR
Availability: BackOrder

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Brand: PURIFI

Show all Mid-range woofer

6.5" | 8 Ω

PTT6.5M08-NFA-01 Ultra Low Distortion Midrange

€ 429,⁹⁵ Out of stock2 expected on 25-04-2025

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We ship to United States of America
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At least two years warranty
45-day cooling-off period to return

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Product description PURIFI PTT6.5M08-NFA-01 Mid-range Woofer

Dedicated midrange driver with enhanced efficiency. Negligible force factor modulation. Ultra-low magnetic hysteresis distortion. Utilizes PURIFI’s neutral surround technology.

Highlights

A whole new take on driver design
PURIFI’s Natural Surround
Extreme low distortion over full excursion range
Engineered and manufactured in Denmark
Excellent midrange performance
High power handling
Perfect balance between volume displacement and midrange efficiency

Product Details

PURIFI PTT6.5M08-NFA-01 Ultra Low Distortion Midrange

PURIFI is a fresh company that designs and manufactures extremely 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 performances degrading aspects for both amplifiers and transducers. Besides this 8 ohm version, there is also a 4-ohm version, the PTT6.5M04-NFA-01, and a 6,5" passive radiator available.

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 to a large degree.

A whole new take on driver design

PURIFI developed mathematical models for the motor system, suspension, cone, and surround. These models allowed for the optimization of each distortion mechanism separately. This systematic approach reduced all distortions mechanisms and keeps intermodulation distortion low. The result makes that the dedicated midrange driver with enhanced efficiency. Negligible force factor modulation. Ultra-low magnetic hysteresis distortion. Utilizes PURIFI’s neutral surround technology.

The mechanism	Improvement
Low force factor modulation	Current through the voice coil is not distorted by cone movement. Gives undistorted midrange regardless of the excursion
Constant force factor over excursion - Bl(x)	Prevents amplitude devotions of midrange output during the 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 the previous cycle

FAQ

Q: Why is this surround odd-shaped?

A: This is the PURIFI Natural Surround. Conventional surroundings 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 a complex sound wave. We are told that the Natural Surround is also called ‘wormy’ by insiders.