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Purifi
PURIFI - 8" Woofer - PTT8.0X04-NAB-01
PURIFI - 8" Woofer - PTT8.0X04-NAB-01
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$1,299.95 AUD
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***CURRENTLY, ALL PURIFI DRIVERS ARE MADE TO ORDER WITH EXPECTED DELIVERY WITHIN 8-12 WEEKS***
Description:
This 8.0" is a member of the ultra low distortion extended-stroke woofer family from PURIFI. The driver incorporates the easily recognizable PURIFI NeutralSurround suspension and ultra-linear motor system PURIFI PureDrive technology working in concert to enable record-breaking linearity specifications over an extended bandwith.
Features:
- Vibroacoustic optimized cone and dust cap in black anodized aluminum
- Negligible Force Factor Modulation (FFM) and Surround Radiation Distortion (SRD)
- Ultra Low Magnetic Hysteresis Distortion (MHD)
- "Real" long-stroke performance with distortion remaining low over full excursion
- Uncompromised midrange performance
- Designed and manufactured in Denmark
Specifications:
| General Specifications | |
|---|---|
| Type | Extended Woofer |
| Size | 8in |
| Nominal impedance | 4Ω |
| Cone material | Black Anodized Aluminum |
| Linear excursion, Xlin | ±9.3mm |
| Maximum mechanical excursion, Xmax | ±15.0mm |
| Motor efficiency factor, Beta | 18.3 (N/A)^2/Ω |
| Efficiency Bandwidth Product, EBP | 72.2Hz |
| Long term maximum power | 350W |
| Rated noise power, 100h | 90W |
| Electrical & Acoustical Parameter | |
|---|---|
| DC resistance | 3.5Ω |
| Minimum impedance above resonance, Zmin | 3.8Ω |
| Frequency for minimum impedance, fmin | 241Hz |
| Maximum impedance, Zo | 52Ω |
| Voice Coil inductance @ 1kHz 0mm, Le | 0.18mH |
| SPL @ 2.83Vrms/1m, 300-800Hz | 89.3dB |
| SPL @ 1W/1m, 300-800Hz | 86.1dB |
| Thiele/Small Parameters | |
|---|---|
| Resonance frequency, fs | 26Hz |
| Mechanical Q factor, Qms | 5.3 |
| Electrical Q factor, Qes | 0.38 |
| Total Q factor, Qts | 0.36 |
| Equivalent volume, Vas | 70.4L |
| Effective piston area, Sd | 235.1cm2 |
| Effective piston diameter, D | 17.3cm |
| Force factor, Bl | 8.0N/A |
| Mechanical resistance, Rms | 1.32kg/s |
| Moving mass, Mms | 43.2g |
| Suspension compliance, Cms | 0.90mm/N |
| Typical Box Tunings | |
|---|---|
| Typical corner frequency, sealed B2 alignment | 51.1Hz |
| Box volume, sealed B2 alignment | 24.6L |
| Typical corner frequency, bass reflex PTT alignment | 25.3Hz |
| Box resonance, bass reflex PTT alignment | 27.6Hz |
| Box volume, bass reflex PTT alignment | 69.0L |
| Port diameter, bass reflex PTT alignment | 6.9cm |
| Port length, bass reflex PTT alignment | 21.6cm |
| Typical corner frequency, 2xPR PTT alignment | 29.3Hz |
| Box volume, 2xPR PTT alignment | 54.7L |
| PR mass per PR, 2xPR PTT alignment | 112.6g |
| Voice Coil Properties | |
|---|---|
| Voice Coil diameter | 52mm |
| Voice Coil length | 23.6mm |
| Voice Coil layers | 2 |
| Airgap height | 5.0mm |
| Winding material | CCAW |
| Physical Dimensions | |
|---|---|
| Basket diameter | 221mm |
| Cutout diameter | 193mm |
| Mounting hole pattern diameter | 210mm |
| Mounting hole diameter | 5.2mm |
| Magnet diameter | 140mm |
| Outer flange height | 5.0mm |
| Build-in depth | 102.0mm |
| Weight | 3.50kg |
| Internal volume displacement | 0.64L |
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