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PURIFI PTT6.5X04-NFA-06 6.5″ Ultra Low Distortion Long Stroke Driver 4 Ohm
The PURIFI PTT6.5X04-NFA-06 is a refined bass-midwoofer, incorporating state of the art technology that is based on extended research. The result is this ultra linear long-stroke woofer with unparalleled performance.
- Impedance (Z)
- 4 ohms
- Power Handling (RMS)
- 250 Watts
- Continuous Program Power
- 80 Watts
€429.95
2 in stock
Delivery options and total cost confirmed at checkout.
Ask us to check connections, dimensions and compatibility before you order.
Get compatibility adviceHighlights
- A whole new take on driver design
- PURIFI’s Natural Surround
- Extreme low distortion over full excursion range
- Engineered and manufactured in Denmark
- Excellent midrange performance
- High power handling
- High linear excursion limit with constant force factor
Product Details
PURIFI PTT6.5X04-NFA-06 bass-midwoofer
PURIFI is a fresh company that designs and manufactures extreme high performance transducers and amplifier modules. Don’t let the freshness fool you; Their leadership team consists out of some well-respected audio technology pioneers. PURIFI developed a deep understanding of many performance degrading aspects for both amplifiers and transducers. Thanks to this understanding the PTT6.5X04-NFA-06 is the most refined bass-mid woofer from our woofer category.
Besides this 4 ohm version, there is also an 8 ohm version and a 6,5″ passive radiator available. Looking for similar performance, but something smaller? Take a look at the 4″ PTT4.0W04.
Specifications
| Article number | PTT6.5X04-NFA-06 |
| EAN | 0691046950031 |
| Woofer Type | Bass-midwoofer |
| Nominal Diameter | 6.5" |
| Power Handling (RMS) | 250 Watts |
| Continuous Program Power | 80 watts |
| Impedance (Z) | 4 ohms |
| Sensitivity (SPL at 1m / 2.83V) | 88.7 dB |
| Frequency Response | – |
| Voice Coil Diameter | 39 mm |
| Magnet Weight | – |
| DC Resistance (Re) | 3.7 ohms |
| Voice Coil Inductance (Le) | 0.38 mH @ 1kHz |
| Resonant Frequency (Fs) | 30 Hz |
| Mechanical Q (Qms) | 5.8 |
| Electromagnetic Q (Qes) | – |
| Total Q (Qts) | 0.27 |
| Diaphragm Mass Inc. Airload (Mms) | 26.7 g |
| Moving Mass Of Diaphragm (Mmd) | – |
| Mechanical Compliance of Suspension (Cms) | 1.04 mm/N |
| Surface Area of Cone (Sd) | 132.7 cm² |
| Volume of Displacement (Vd) | 132.7 cm³ |
| BL Product (BL) | 8.1 |
| Compliance Equivalent Volume (Vas) | 25.9 liter |
| Maximum Linear Excursion (Xmax) | 10 mm |
| Driver's Mechanical Losses (Rms) | 0.88 kg/s |
| Cone / Diaphragm Material | Proprietary Fibre Mix |
| Surround Material | Nitrile rubber |
| Voice Coil Wire Material | Aluminum |
| Voice Coil Former | Fiberglass |
| Dual Voice Coil | – |
| Basket / Frame Material | Aluminum alloy diecast |
| Magnet Material | Ferro-magnetic |
| Shielded | – |
| Overall Outside Diameter | 176 mm |
| Overall Depth | 90.2 mm |
| Baffle Cutout Diameter | 149 mm |
| Bolt Circle Diameter | 166 mm |
| # Mounting Holes | 6 |
| Mounting Hole Diameter | 5.1 mm |
| Sealed Volume | – |
| Sealed F3 | – |
| Vented Volume | – |
| Vented F3 | – |
| The mechanism | Improvement |
| Low force factor modulation | Current through the voice coil is not distorted by cone movement. Gives undistorted midrange regardless of excursion |
| Constant force factor over excursion – Bl(x) | Prevents amplitude devotions of midrange output during large excursion (sometimes called ‘burbling’) |
| Low surround radiation distortion | Reduces harmonic and intermodulation distortion caused by surround |
| Low magnetic hysteria distortion | Reduces harmonic and intermodulation distortion caused by magnetic traces left by previous cycle |
| Article number | PTT6.5X04-NFA-06 |
| EAN | 0691046950031 |
| Woofer Type | Bass-Midwoofer |
|---|---|
| Nominal Diameter | 6.5″ |
| Power Handling (RMS) | 250 Watts |
| Continuous Program Power | 80 Watts |
| Impedance (Z) | 4 ohms |
| Sensitivity (SPL at 1m / 2.83V) | 88.7 dB |
| Voice Coil Diameter | 39 mm |
| DC Resistance (Re) | 3.7 ohms |
| Voice Coil Inductance (Le) | 0.38 mH @ 1kHz |
| Resonant Frequency (Fs) | 30 Hz |
| Mechanical Q (Qms) | 5.8 |
| Total Q (Qts) | 0.27 |
| Diaphragm Mass Inc. Airload (Mms) | 26.7 g |
| Mechanical Compliance of Suspension (Cms) | 1.04 mm/N |
| Surface Area of Cone (Sd) | 132.7 cm² |
| Volume of Displacement (Vd) | 132.7 cm³ |
| BL Product (BL) | 8.1 |
| Compliance Equivalent Volume (Vas) | 25.9 liter |
| Maximum Linear Excursion (Xmax) | 10 mm |
| Driver's Mechanical Losses (Rms) | 0.88 Kg/s |
| Cone / Diaphragm Material | Proprietary Fibre Mix |
| Surround Material | Nitrile rubber |
| Voice Coil Wire Material | Aluminum |
| Voice Coil Former | Fiberglass |
| Basket / Frame Material | Aluminum alloy diecast |
| Magnet Material | Ferro-magnetic |
| Overall Outside Diameter | 176 mm |
| Overall Depth | 90.2 mm |
| Baffle Cutout Diameter | 149 mm |
| Bolt Circle Diameter | 166 mm |
| # Mounting Holes | 6 |
| Mounting Hole Diameter | 5.1 mm |
| The mechanism | Improvement |
| Low force factor modulation | Current through the voice coil is not distorted by cone movement. Gives undistorted midrange regardless of excursion |
| Constant force factor over excursion - Bl(x) | Prevents amplitude devotions of midrange output during large excursion (sometimes called ‘burbling’) |
| Low surround radiation distortion | Reduces harmonic and intermodulation distortion caused by surround |
| Low magnetic hysteria distortion | Reduces harmonic and intermodulation distortion caused by magnetic traces left by previous cycle |
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