sharp and piercing high pitch /frequency coming out from Harbeth C7

Sometimes the original master is done using microphones that have their own frequency response anomalies, or the engineer messes with the frequency response -- perhaps because the studio monitors had a dip where your speakers do not -- or due to a number of other reasons.

Which is why you need an equalizer in your system. It should be illegal to sell speakers without EQ. 

Both channels?  Equally?  Tried swopping L and R connections?

@noramnce @jjss49 i am looking into the RCA cable and the power supply now because this problem happens on CD not vinyl.

@mlsstlyes, agree and i thought about it. However, i have already chosen those with DDD recordings, DECCA, EMI, etc. And it is funny that seems like every time i hear the same track , i taste different things.

i talked to a cable company guy, he said my cable is too bright and sharp for harbeth. He suggests another brand which can “ pull back” the top notes a bit with warm and sweet sound.
maybe the resonance causes a peak with certain treble frequencies.... seems like this way, kind of....

@kenjit the tracks are :
Aida Garifullina, Cornelius Meister, ORF Radio-Symphonieorchester Wien ‎–Aida Garifullina

track 4

What's the recording and music? In my experience all Harbeth don't show a sharp piecing treble, even if you use the brightest amp, electronics or cables. Hence I am suspecting the music or recording to be the culprit to the bright sound you are getting with the C7ES3 40th Anniversary. Perhaps the 40th anniversary was tuned to have a treble peak, that I'm not sure but the original C7ES3 actually sounds a bit warm to my ears when compared to SHL5+.