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good eq settings for e3c/scl3 shure headphones and sansa e250r

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dunno:
scroll down to "Plotting RB-J Equalisers In Excel" and download the rbj_eq.xls spreadsheet which will help you visualise EQ changes.

http://www.musicdsp.org/archive.php?classid=0#218

soap:
1 - If I'm reading that right, you should really drop the .1 db peaking filter - that is a waste of CPU.  Nobody can hear that subtle of a change.
The 1.4 db peaking filter is likely inaudible as well.  No promises on that one, but very likely inaudible.
Shaving those two filters out will save a ton of CPU time and therefore battery life.

2 - Remember, what is visible on a pretty chart != what is audible.

3 - Set the EQ precut at least to the (inverse) level of your highest boost.  You sacrifice a bit of SNR to prevent clipping/distortion.

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