It would be awesome if we started getting some graphs of the filter combos....anyone working on it?
Funny u ask that, cuz
@Brooko is doing a review on them, which means they will be supplied.
And to elaborate on your discontent for the front blue... It is most likely the interval of the treble frequency that is accentuated/emphasized in that setup that may cause the disliking of it...
You'll notice that the varying front filters, emphasize/accentuate at progressing intervals along the sound signature, sometimes having a diminishing effect on the soundstage.
In my experience the BLACKf and BLUEf have the largest soundstage while the PINK and GRAY have the smallest. GREENf and REDf are in between.
REDf and GRAYf work more on to emphasize the mids.
The GREENf works more on the upper mids, maybe lower treble.
The BLUEf works more on the treble.
And the BLACK seems to have the most tamed emphasizing along the spectrum, with maybe a tinge on the treble, though is not as perceptible to me and may just be a result of less emphasis elsewhere rather than more emphasis on the treble.
I tell you it is tricky to figure these things out beyond "liking" and "disliking"... I still dislike the PINK lolol, sorry to have no love for the PINK, though I'm sure it is nice for some.