Purifi Audio PTT6.5W08 -NFA-01
6.5" (16.5cm) bass-midrange driver
/Piece
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Beschreibung
- A whole new perspective on driver design
- The Natural Surround from PURIFI
- Extremely low distortion over the entire deflection range
- Developed and manufactured in Denmark
- Excellent midrange performance
- High resilience
- High linear deflection limit with constant force factor
The PTT6.5W08 -NFA-01 is a 6.5" (16.5cm) mid-woofer from Purifi Audio. This mid-woofer stands out for its groundbreaking technology and improved efficiency thanks to a reduced excursion limit. Designed and manufactured in Denmark, it has a unique driver design and consists of a proprietary fiber mix. Special features include low distortion across the entire excursion range, high power handling and great mid-range performance. In addition, the mid-woofer is equipped with PURIFI's Natural Surround, which helps reduce resonances and distortion.
highlights
product details
- driver size 6.5"
- impedance 8 ohms
- DC resistance, RDC 6.9 Ω
- resonance frequency, fs 39 Hz
- overall Q-factor, Qts 0.33
- Effective area, Sd 133 cm2
- Equivalent volume, Vas 22 L
- SPL@2.83Vrms /1m 87.9 dB
- Linear Xmax +/- 5.9 mm
- Mechanical Xmax +/- 14.5 mm
- IEC load capacity 250 W
- Cone material Proprietary fiber mix
FAQ
F
-
: Why is the bead oddly shaped?
A
-
This is the PURIFI Natural Surround. Conventional surrounds create distortion when they deform. The shape of the Natural Surround reduces resonance and distortion at the diaphragm edges. It may look strange, but here form follows function. A closer look reveals that the surround actually represents a complex sound wave. We are told that the Natural Surround is also referred to as "wormy" by those in the know.
Data
- nominal diameter 6.5"
- impedance 8 ohms
- load capacity (QMW) 250 watts
- RMS power 80 watts
- Sensitivity 87.9 dB @ 2.83V/1m
- voice coil diameter 39 mm
- DC resistance (Re) 6.9 ohm
- Voice coil induction (Le) 0.48 mH @ 1kHz
- resonance frequency (Fs) 38.5 Hz
- Mechanical quality (Qms) 6.7
- Electrical quality (Qes) 0.35
- Total quality (Qts) 0.33
- Moving mass (Mms) 19.4g
- Suspension compliance (Cms) 0.88 mm/N
- Membrane area (Sd) 132.7 cm2
- displacement volume (Vd) 78.3 cm3
- force factor (BL) 9.6
- Equivalent volume (Vas) 22 liters
- Maximum deflection (Xmax) 5.9 mm
- Mechanical loss (Rms) 0.9 kg/s
- outer diameter 176 mm
- total depth 90.2 mm
- cutout diameter 145 mm
- bolt circle diameter 166 mm
Dimensions
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