Sibilance is present to some degree but it must be more troubling than usual or you would'nt have asked for help.
two things stand out to me- retip and VTA.
I have had Soundsmith retips on two cartridges including a cadenza blue. they may take 70 hrs or so to sound smooth, if yours is fresh this could be part of the issue.
Second is VTA. Not sure how yours is set but to me there is only one way to get an initial reference VTA- make sure the top of the headshell is level when it is in a record groove.
You do this by using a small round bubble level and set it on top of the flat surface of the headshell.
Balance the arm and adjust VTF to what the cartridge uses to compensate for the mass of the level. Lower it on to a stopped LP and adjust the arm height until the headshell shows level .
Re adjust VTF and play away. Most good carts respond well to a level headshell, which is parallel to the top of the cartridge.
Other causes of sibilance i have witnessed-
too much phono stage gain
bright interconnects, avoid silver or hybrid
too high resistance loading on MCs
two things stand out to me- retip and VTA.
I have had Soundsmith retips on two cartridges including a cadenza blue. they may take 70 hrs or so to sound smooth, if yours is fresh this could be part of the issue.
Second is VTA. Not sure how yours is set but to me there is only one way to get an initial reference VTA- make sure the top of the headshell is level when it is in a record groove.
You do this by using a small round bubble level and set it on top of the flat surface of the headshell.
Balance the arm and adjust VTF to what the cartridge uses to compensate for the mass of the level. Lower it on to a stopped LP and adjust the arm height until the headshell shows level .
Re adjust VTF and play away. Most good carts respond well to a level headshell, which is parallel to the top of the cartridge.
Other causes of sibilance i have witnessed-
too much phono stage gain
bright interconnects, avoid silver or hybrid
too high resistance loading on MCs