A lot of the early pressing CD’s had the issue.
They simply took the original master for the LP and dropped it onto the CD format.
The end result was a lot of sibilance and extremely dry sounding, bright recordings.
Later re-masters of the original analog recordings, specifically mixed for digital format (CD) eliminated much of the issue.
If your system and speakers are fairly accurate, it won’t be hard to test/prove out.
As for your speakers, they should pretty much be reproducing what they're fed.
They simply took the original master for the LP and dropped it onto the CD format.
The end result was a lot of sibilance and extremely dry sounding, bright recordings.
Later re-masters of the original analog recordings, specifically mixed for digital format (CD) eliminated much of the issue.
If your system and speakers are fairly accurate, it won’t be hard to test/prove out.
As for your speakers, they should pretty much be reproducing what they're fed.