Purifi Audio PTT6.5X04-NAA-08

With the PTT6.5X04-NAA-08, Purifi Audio presents a revolutionary 6.5" mid-woofer from the PURIFI woofer family. The speaker, developed and manufactured in Denmark, features innovative technologies. Thanks to its reduced excursion limit, it is characterized by improved efficiency compared to the long-throw woofer PTT6.5X04-NFA-01. The special features of the PTT6.5X04-NAA-08 include a completely new design, a natural surround from Purifi, extremely low distortion across the entire excursion range and excellent performance and high power handling in the midrange. Due to its perfect balance between volume displacement and efficiency, it also offers unique sound performance.

• A completely new design for the speaker
• PURIFI's Natural Surround
• Extremely low distortion over the entire deflection range 
• Developed and manufactured in Denmark
• Excellent midrange performance
• High resilience
• Perfect balance between volume shift and efficiency in the midrange

• woofer type Extended Woofer
• nominal diameter 16.5 cm
• load capacity (QMW) 250 W
• Impedance (Z) 4 Ohms
• Sensitivity (SPL at 1m / 2.83V) 86.8 dB
• DC resistance (Re) 3.7 Ω
• Voice coil induction (Le) 0.36 mH
• resonance frequency (Fs) 32 Hz
• Mechanical quality (Qms) 7.5
• Electrical quality (Qes) 0.37
• Total quality (Qts) 0.35
• Moving mass (Mms) 29.8 g
• Suspension compliance (Cms) 0.82 mm/N
• Membrane area (Sd) 132.7 cm2
• Power Factor (BL) 7.8 N/A
• Equivalent volume (Vas) 20.5 L
• Maximum deflection (Xmax) 9.8 mm
• Driver's Mechanical Losses (Rms) 0.81 kg/s
• Cone / Diaphragm Material Black Anodized Aluminum