Hi all
Topic i havent seen much solid info on
Im keen on measuring woofer distortion both baffled and unbaffled.-linkwitzlabs style,steady state sine and impulse.
Mainly consisting of THD and IMD measurements
Ive seen the site listed below-but its not highly useful due to different drive voltages used!
Questions
1-Is the FFT in cooledit accurate enough?Can do quite high FFT size,ive heard of people using it for specialist uses.
2-If i was to keep one thing constant-should it be drive voltage/power OR SPL
3-program to use hobbybox4/praxis demo/winmls etc
4-Baffle size when used? IEC size? Im only considering the bass frequencies so i think this isnt such an issue at all
RS SPL meter->cooledit recording line in-inspection of wave files with FFT tool
Il only consider outside measurements to keep it simple and not get into MLS/gated stuff.
Im keen on seeing the resonant effects of ported box vs horn vs IB etc!
-Hopefully my eyes will show what i hear
Apparently the TCsounds 2+ matches the XLS12 driver distortionwise!
When i overlay the two graphs to have the same fundamental amplitude-
xls seems to have more distortions(+10db) at 4th and 5th harmonic.
Cheers!
Mike.e
tc2+ vs xls www.mfk-projects.com
Topic i havent seen much solid info on
Im keen on measuring woofer distortion both baffled and unbaffled.-linkwitzlabs style,steady state sine and impulse.
Mainly consisting of THD and IMD measurements
Ive seen the site listed below-but its not highly useful due to different drive voltages used!
Questions
1-Is the FFT in cooledit accurate enough?Can do quite high FFT size,ive heard of people using it for specialist uses.
2-If i was to keep one thing constant-should it be drive voltage/power OR SPL
3-program to use hobbybox4/praxis demo/winmls etc
4-Baffle size when used? IEC size? Im only considering the bass frequencies so i think this isnt such an issue at all
RS SPL meter->cooledit recording line in-inspection of wave files with FFT tool
Il only consider outside measurements to keep it simple and not get into MLS/gated stuff.
Im keen on seeing the resonant effects of ported box vs horn vs IB etc!
-Hopefully my eyes will show what i hear
Apparently the TCsounds 2+ matches the XLS12 driver distortionwise!
When i overlay the two graphs to have the same fundamental amplitude-
xls seems to have more distortions(+10db) at 4th and 5th harmonic.
Cheers!
Mike.e
tc2+ vs xls www.mfk-projects.com
Ok ive got a list of software now
Speaker workshop(especially since its free)
Winmls
Clio
Praxis ...
Spectralab
What il do is download all of those-Do the measurements all at once,and see what i get!Compare results and see what works and whats hard to use...
And once chosen i could jump in and buy the one most suitable + a better mic than RS spl meter
Cheers!
Speaker workshop(especially since its free)
Winmls
Clio
Praxis ...
Spectralab
What il do is download all of those-Do the measurements all at once,and see what i get!Compare results and see what works and whats hard to use...
And once chosen i could jump in and buy the one most suitable + a better mic than RS spl meter
Cheers!
mike.e said:Hi all
Topic i havent seen much solid info on
Im keen on measuring woofer distortion both baffled and unbaffled.-linkwitzlabs style,steady state sine and impulse.
Mainly consisting of THD and IMD measurements
Ive seen the site listed below-but its not highly useful due to different drive voltages used!
Questions
1-Is the FFT in cooledit accurate enough?Can do quite high FFT size,ive heard of people using it for specialist uses.
[....]
The FFT in CoolEdit is quite accurate, far better than any sound card out there. I used it recently to debug a nasty aliasing problem for $DAYJOB.
Francois.
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