Dear @paulcreed : "" I would like to make them very smooth relaxed...."""
"" just scared it may be bright ..."""
"" unless someone can suggest a non fatiguing musical cap around """
with all those you posted I can’t be sure if you really like MUSIC and I mean live MUSIC and I say this because live MUSIC at nearfield seated position ( 2-3m that’s where recording microphones are positioned. ) is not smooth in any way and it’s brigth and depending of the kind of MUSIC fatiguiting too and yes colorfull with great dynamics/power/weigth and very fast transients and gorgeous rythm.
"" looking for a smooth, liquid and a natural sound with weight on cymbals,.... """
you ask in your words for " natural sound " well the live MUSIC has natural sound with those characteristics I mentioned before and many others. Maybe you have to attend more often to live MUSIC events and try to have experiences seated at nearfield position and then you will know how live MUSIC is in reality that’s not what you are looking for. You ask for something that just does not exist in live MUSIC.
It's the same with @beetlemania when he speaks of " adding warmth " when live MUSIC is not warmth in any way ! ! ? ? ?
From where came all those wrong adjectives used to show MUSIC characteristics when those characteristics do not exist in live MUSIC ? ? Gentlemans, what are you listening it because MUSIC : no way?
Btw, Jantzen Alumen Z caps. Don’t by-pass nothing till the caps are already broken and you can really evaluate the quality performance of thoase speakers.
Regards and enjoy the MUSIC NOT DISTORTIONS,
R.