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.
The PTT8.0X04-NAB-01 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 Paramters
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
