Can sibilance be eliminated?

I have a CD only system & it has great detail that exhibits no sibilance but I wouldn't necessarily say that was a condition relegated to digital payback. Your system synergy (or lack of) will have a lot to do in determining what is the best direction to go regarding your particular problem.

Since you did not list any of your components, it's difficult to even begin to offer suggestions, as it could be any number of things.

I would start with microphones and the rest of recording equipment first.

Sibilance is a natural occurrence in song/speech. 99% of the recordings I've experienced depict this (100% of the older live performances I've attended as well, prior to them receiving digital help/bandaids in the "near" real time).

Other than teeth/mouths/tounges it's also influenced by microphone usage skills.

Certainly it can be blocked/filtered by various means, but to do so will also be @ the detriment of other portions of the music.

My main speakers for 8 years were Ls3/5a's (the industry standard for reproducing speech) and they portrayed such S's with aplomb.

Too much, however is too much, but a certain amount is considered to be normal.

Yes, assuming the negative sibilance is not in the recording itself, it can be entirely eliminated through proper AC line conditioning assuming you have a certain caliber of components.

Although vibration and resonance control can perform wonders in and of itself, I do not agree at all with the statement that vibration or resonance control having anything to do with inducing negative sibilance into a playback system.

-IMO

I've found the worst of the sibilance can be decreased or eliminated via careful controlling of room reflections and power conditioning.