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

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

.

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.

.

Specifications

Article number PTT6.5M08-NFA-01

Woofer Type Ultra Low Distortion Midrange

Nominal Diameter 6.5"

Power Handling (RMS) 200 Watts

Impedance (Z) 8 Ohms

Sensitivity 2.83Vrms/1m 91.0 dB

DC Resistance (Re) 6.5 Ω

Resonant Frequency (Fs) 57 Hz

Electromagnetic Q (Qes) 0.42

Total Q (Qts) 0.38

Diaphragm Mass Inc. Airload (Mms) 17.0 g

Mechanical Compliance of Suspension (Cms) 0.46 mm/N

Surface Area of Cone (Sd) 133 cm2

BL Product (BL) 9.7 N/A

Compliance Equivalent Volume (Vas) 12 L

Maximum Linear Excursion (Xmax) +/- 3.9 mm

Driver's Mechanical Losses (Rms) 1.44 kg/s

Cone / Diaphragm Material Proprietary Fibre Mix