And honestly I’m not comfortable loading a cartridge as high as 100k ohms. If that was recomended then I think you would see that value on most phono preamps. I think at that value it might just be masking some of the sibilance and effecting the sound elsewhere, imo. There has to be a good reason why the standard value is a universal 47k ohm. However that is all irrelevant as I dont use mm cartridges as a whole. I like to use low output mc cartridges which are a different animal. Although the 47k ohm does come into play with my eroica, when used seldomly. I find the higher I load a low out put mc, the high frequencies are enhanced at detriment to the Low and vice versa....I have found a good range for my hana el to be between the recomended 400 ohm and 500 ohms. Luckily my pro ject tube box has a dial in front panel for on the fly adjustments. Even still, with all the adjusting, some records are still sibilant. I could go on and on likely forever about it. Yes maybe with much deeper pockets and disposable income you can reduce it even on some very effected pressings, but you will not make It go away completely in my honest opinion, if it’s in fact the record itself. If it were my equipment, I feel I’d be hearing it every where on every thing...but I do not. For example, Linda ronstadt sounds just fine, emmylou Harris sounds great, Patti page sounds fine, Nancy Sinatra sounds spectacular! Then there are some recordings of my julie london collection that are riddled with sibilance, but then some are not! To me any how, I think it just varies from record to record and there is not a thing that can be done. At least not on my budget or income level.