Purifi Audio PTT6.5W08-NFA-01
6.5" (16.5cm) bass-midrange driver
/piece
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Your advantages with Masori
Description
- A whole new perspective on driver design
- The Natural bead from PURIFI
- Extremely low distortion over the entire deflection range
- Developed and manufactured in Denmark
- Excellent performance in the mid-range
- High load capacity
- High linear deflection limit with constant force factor
The PTT6.5W08-NFA-01 is a 6.5" (16.5cm) bass-midrange driver from Purifi Audio. This bass-midrange driver stands out with its groundbreaking technology and improved efficiency thanks to a reduced excursion limit. Designed and manufactured in Denmark, it features a unique driver construction and consists of a proprietary fiber mix. Special features include low distortion over the entire excursion range, high power handling and great midrange performance. In addition, the bass-midrange driver is equipped with PURIFI's Natural surround, which helps to reduce resonance and distortion.
Highlights
Product details
- Driver size 6.5"
- Impedance 8 Ohm
- Direct current resistance, RDC 6.9 Ω
- Resonance frequency, fs 39 Hz
- Total Q-factor, Qts 0.33
- Effective area, Sd 133 cm2
- Equivalent volume, Vas 22 L
- [email protected]/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
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: Why is the bead oddly shaped?
A
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This is the PURIFI Natural surround. Conventional surrounds produce distortions when they deform. The shape of the Natural surround reduces the resonances and distortions at the edges of the membrane. It may look strange, but here form follows function. A closer look reveals that the surround is actually a complex sound wave. We are told that the Natural surround is also referred to as "wormy" by insiders.
Data
- Nominal diameter 6.5"
- Impedance 8 Ohm
- Load capacity (QMW) 250 watts
- RMS power 80 watts
- Sensitivity 87.9 dB @ 2.83V/1m
- Voice coil diameter 39 mm
- Direct current resistance (Re) 6.9 ohm
- Voice coil induction (Le) 0.48 mH @ 1kHz
- Resonant frequency (Fs) 38.5 Hz
- Mechanical quality (Qms) 6.7
- Electrical quality (Qes) 0.35
- Overall quality (Qts) 0.33
- Moving mass (Mms) 19.4g
- Compliance of the suspension (Cms) 0.88 mm/N
- Diaphragm 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
Dimensions
- Outer diameter176 mm
- Total depth 90.2 mm
- Cut-out diameter 145 mm
- Bolt circle diameter 166 mm
Download data sheet
