Purifi Audio PTT4.0X08-NAC-03

The PTT4.0X08-NAC-03, manufactured by Purifi Audio, takes the performance of compact 4" long-throw drivers to a new level. With the easily recognizable PURIFI NeutralSurround suspension and the ultra-linear motor system PURIFI PureDrive technology, this model represents an almost unparalleled quality. Special features such as the vibroacoustically optimized diaphragm and dust cap made of black anodized aluminum, negligible Force Factor Modulation (FFM) and Surround Radiation Distortion (SRD) as well as low Magnetic Hysteresis Distortion (MHD) make it a pioneer in the field. Designed and manufactured in Denmark, the PTT4.0X08-NAC-03 offers pristine midrange performance and "true" long-throw performance with low distortion over the entire stroke.

• Vibroacoustically optimized cone and dust cap made of black anodized aluminum
• Negligible Force Factor Modulation (FFM) and Surround Radiation Distortion (SRD)
• Low magnetic hysteresis distortion (MHD)
• Dedicated midrange driver with improved efficiency
• "Real" long-stroke performance with low distortion over the entire stroke
• Unadulterated midrange performance
• Developed and manufactured in Denmark

• woofer type Long Stroke driver
• nominal diameter 10.16 cm
• load capacity (QMW) 200 watts
• Sensitivity (SPL at 1m / 2.83V) 81.8 dB
• voice coil diameter 30 mm
• DC resistance (Re) 6.5 Ω
• resonance frequency (Fs) 43 Hz
• Mechanical quality (Qms) 4.1
• Electrical quality (Qes) 0.43
• Overall quality (Qts) 0.39
• Moving mass (Mms) 11.9 g
• Suspension compliance (Cms) 1.16 mm/N
• Membrane area (Sd) 56.7 cm2
• Force Factor (BL) 7.0 N/A
• Equivalent volume (Vas) 5.3 L
• Maximum deflection (Xmax) 6.85 mm
• Driver's Mechanical Losses (Rms) 0.79 kg/s
• cutout diameter 101 mm
• mounting hole diameter 4.2 mm