Purifi Audio PTT6.5M04-NFA-01
6.5" (16.5cm) bass-midrange driver
/piece
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Description
Discover the PTT6.5M04-NFA-01, a specially optimized midrange driver from the renowned supplier Purifi Audio. This audio component presents a new dimension in driver development. The Danish-developed device stands out with impressively low distortion over the entire dynamic range and high power handling. With PURIFI's Natural surround technology and an efficient balance between volume displacement and efficiency in the midrange, this model truly radiates perfection. Let yourself be convinced by the first-class performance of this midrange driver, whose quality can be felt in every detail.
Highlights
- A completely new type of driver development
- PURIFI's Natural bead
- Extremely low distortion over the entire dynamic range
- Developed and manufactured in Denmark
- Outstanding performance in the mid-range
- High load capacity
- Perfect balance between volume shift and efficiency in the midrange
- The mechanism improvement modulation with low force factor
- Improvement
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The current through the voice coil is not distorted by the diaphragm movement. Ensures an undistorted midrange regardless of the excursion
- Constant force factor over the deflection - Bl(x)
- Prevents amplitude deviations of the mid-range output during large excursions (sometimes referred to as "grumbling")
- Low distortion due to surround radiation Low magnetic hysteresis distortion
- Reduces harmonic and intermodulation distortion caused by the surround
- Reduces harmonic and intermodulation distortions caused by magnetic traces from the previous cycle
The challenge
Loudspeaker drivers are known to cause a large, if not the largest, amount of distortion in an audio signal chain. Reducing these distortions is a challenge, as fine-tuning to improve one part (e.g. harmonic distortion) often leads to a deterioration of another part (e.g. intermodulation distortion). These distortions are made up of several separate distortion mechanisms. By carefully mapping and fully understanding these mechanisms, PURIFI has succeeded in improving the overall performance to a great extent.
A completely new perspective on driver design
PURIFI developed mathematical models for the motor system, the suspension, the cone and the surround. These models made it possible to optimize each distortion mechanism separately. This systematic approach reduces all distortion mechanisms and keeps intermodulation distortion low. The result is that the PTT6.5M04-NFA-01 is a compact 6.5-inch driver that matches or exceeds the bass performance of a large-area, low excursion driver, while also providing excellent midrange performance.
Properties
- Nominal diameter 16.5 cm
- Load capacity (QMW) 250 W
- Impedance (Z) 4 Ohms
- Sensitivity (SPL at 1m / 2.83V) 93.2 dB
- Direct current resistance (Re) 3.9 Ω
- Voice coil induction (Le) 0.26 mH
- Resonant frequency (Fs) 55 Hz
- Mechanical quality (Qms) 4.2
- Electrical quality (Qes) 0.36
- Overall quality (Qts) 0.33
- Moving mass (Mms) 17.8 g
- Compliance of the suspension (Cms) 0.47 mm/N
- Diaphragm area (Sd) 132.7 cm2
- Force factor (BL) 8.1 N/A
- Equivalent volume (Vas) 11.7 L
- Maximum deflection (Xmax) 3.9 mm
- Driver's Mechanical Losses (Rms) 1.47 kg/s
- Cone / Diaphragm Material Proprietary Fibre Mix
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