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
8Ω
Cone material
Black Anodized Aluminum
Linear excursion, Xlin
±9.3mm
Maximum mechanical excursion, Xmax
±15.0mm
Motor efficiency factor, Beta
19.1 (N/A)^2/Ω
Efficiency Bandwidth Product, EBP
68.6Hz
Long term maximum power
TBD
Rated noise power, 100h
TBD
Electrical & Acoustical Parameter
DC resistance
6.0Ω
Minimum impedance above resonance, Zmin
6.6Ω
Frequency for minimum impedance, fmin
223Hz
Maximum impedance, Zo
100Ω
Voice Coil inductance @ 1kHz 0mm, Le
0.33mH
SPL @ 2.83Vrms/1m, 300-800Hz
86.4dB
SPL @ 1W/1m, 300-800Hz
85.6dB
Thiele/Small Paramters
Resonance frequency, fs
24Hz
Mechanical Q factor, Qms
5.8
Electrical Q factor, Qes
0.37
Total Q factor, Qts
0.35
Equivalent volume, Vas
74.5L
Effective piston area, Sd
235.1cm2
Effective piston diameter, D
17.3cm
Force factor, Bl
10.7N/A
Mechanical resistance, Rms
1.22kg/s
Moving mass, Mms
47.6g
Suspension compliance, Cms
0.95mm/N
Typical Box Tunings
Typical corner frequency, sealed B2 alignment
48.5Hz
Box volume, sealed B2 alignment
24.2L
Typical corner frequency, bass reflex PTT alignment
