I finally had the time to compare the LL1933Ag transformers against the regular LL1933
The comparison was done with my EC8020 LCR phonostage. The result was quite remarkable. There is a very audible difference between the two. The silver transformers sound smoother, yet have a tad more resolution. A very pleasant sound with no hint of coloration or distortion. Very different than the common prejudice of 'silver sound' would suggest.
All the characteristics of records are more pronounced with the silver transformers. Electric guitars have more twang. Hammond organs sound a bit more dirty. The music has more character through these step ups. Or more correctly stated: the character of the record is better preserved.
I was very surprised since I did not expect a big difference. As some of my posts suggest, I'm quite critical about the importance of cable sound. The difference the silver makes in these transformers is an order of an magnitude more audible than the difference between copper and silver wire when used for internal hook up or interconnects.
Where does this leave the copper LL1933s? Should you replace them with the silver version? Of course these don't make the standard LL1933 a bad performer. It is one of the finest MC step ups out there. If you have your dream phonostage already, consider the LL1933Ag for an improvement. If you do not have a maxxed out phonostage yet, there might be other things to improve first before going for silver transformers.