I did the upgrade & it sounds excellent.I took it to ( my good audiophile Dr. friend´s place ) to do a side by side with his AR Ref 40 Anniversary & AMR ( separate ) dedicated phono stage.The Janus stands up to the AR with AMR. The sound was a little ¨ dark ¨to my liming. The difference was very little, with the Janus sounding more transparent. Really , it was really difficult to tell the difference, & that only on high quality LP´s.
The speakers in use were Magico M3 ( serial nos 200 & 201 ).The best upgrade I could recommend for anyone with a Calypso : Mind you , I did the full mile: Power supply upgrade & tube upgrade as well ( recommended by Aesthetix ).