film capacitor help please.

[goraman]

I upgraded the caps in my crossovers from very cheap surplus caps to Obbligato gold caps known to favor upper midrange and the top end for the tweeters.

I chose to use a Clarity cap ESR for a smaller cap that runs in parallel to the larger obbligato and some how reduces the larger caps value.

The Korean/surplus film caps where awful and lacked detail in the upper range of the tweeter.
Now I seem to have loads of details coming through and I love the tone of what I have and acoustic guitars just seem to come alive but I have a couple of recordings that have gone sybilint since the upgrade.

Can a cap have so much affect?
Am I being to picky about this?
I am thinking of changing the obbligatos to Clarity Cap MR,they are 10 uf.

Would this settle down the upper mids and leave the upper details in tact?

Or is a little upper mid range bump a bad thing?
98% of my albums sound fantastic, very smooth presentation so it's not annoying but Jenifer Warrens Famous Blue Rain Coat dose present some sibilance at times.

Should I accept a little sibilance with just a couple of albums for such great blues and jazz presentation?
I mean the texture of brushes on a snare will give you goose bumps.