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Purifi
PURIFI - 4" Woofer - PTT4.0X08-NFC-01
PURIFI - 4" Woofer - PTT4.0X08-NFC-01
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$699.95 AUD
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***CURRENTLY, ALL PURIFI DRIVERS ARE MADE TO ORDER WITH EXPECTED DELIVERY WITHIN 8-12 WEEKS***
Description:
The 4” long-stroke driver incorporates the easily recognizable PURIFI NeutralSurround suspension and ultra-linear motor system PURIFI PureDrive technology working in concert to elevate performance to a whole new level despite of it’s compact size.
Features:
- Vibroacoustic optimized cone and dust cap in proprietary paper fiber mix
- Negligible Force Factor Modulation (FFM) and Surround Radiation Distortion (SRD)
- 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 | 4in |
Nominal impedance | 8Ω |
Cone material | Proprietary Fiber Mix |
Linear excursion, Xlin | ±8.8mm |
Maximum mechanical excursion, Xmax | ±13.7mm |
Motor efficiency factor, Beta | 7.4 (N/A)^2/Ω |
Efficiency Bandwidth Product, EBP | 110.8Hz |
Long term maximum power | 200W |
Rated noise power, 100h | 60W |
Electrical & Acoustical Parameter | |
---|---|
DC resistance | 6.4Ω |
Minimum impedance above resonance, Zmin | 7.1Ω |
Frequency for minimum impedance, fmin | 268Hz |
Maximum impedance, Zo | 72Ω |
Voice Coil inductance @ 1kHz 0mm, Le | 0.51mH |
SPL @ 2.83Vrms/1m, 300-800Hz | 82.0dB |
SPL @ 1W/1m, 300-800Hz | 81.5dB |
Thiele/Small Parameters | |
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Resonance frequency, fs | 41Hz |
Mechanical Q factor, Qms | 4.2 |
Electrical Q factor, Qes | 0.41 |
Total Q factor, Qts | 0.37 |
Equivalent volume, Vas | 5.7L |
Effective piston area, Sd | 56.7cm2 |
Effective piston diameter, D | 8.5cm |
Force factor, Bl | 6.9N/A |
Mechanical resistance, Rms | 0.73kg/s |
Moving mass, Mms | 11.7g |
Suspension compliance, Cms | 1.25mm/N |
Typical Box Tunings | |
---|---|
Typical corner frequency, sealed B2 alignment | 78.3Hz |
Box volume, sealed B2 alignment | 2.1L |
Typical corner frequency, bass reflex PTT alignment | 38.4Hz |
Box resonance, bass reflex PTT alignment | 42.2Hz |
Box volume, bass reflex PTT alignment | 6.0L |
Port diameter, bass reflex PTT alignment | 4.1cm |
Port length, bass reflex PTT alignment | 37.1cm |
Typical corner frequency, 2xPR PTT alignment | 45.0Hz |
Box volume, 2xPR PTT alignment | 4.7L |
PR mass per PR, 2xPR PTT alignment | 30.4g |
Voice Coil Properties | |
---|---|
Voice Coil diameter | 30mm |
Voice Coil length | 21.6mm |
Voice Coil layers | 4 |
Airgap height | 4.0mm |
Winding material | Alu |
Physical Dimensions | |
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Basket diameter | 125mm |
Cutout diameter | 101mm |
Mounting hole pattern diameter | 115mm |
Mounting hole diameter | 4.2mm |
Magnet diameter | 90mm |
Outer flange height | 3.6mm |
Build-in depth | 73.5mm |
Weight | 1.25kg |
Internal volume displacement | 0.23L |
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