Kondo-san (RIP) taught me over 20 yrs ago to use SUTs. Audio Note Japan only built MM phono stages and only built MC cartridges so had to use SUTs. Their own KSL SUT was wonderful and a perfect match to their IO-m cartridge.
Unfortunately I had a listening session on Kondo's full reference system, set up by Kondo personally ( $1m back in the 80's ) - sounded lovely until I put a big orchestral record on, at which point the system fell to pieces - no speed and timing fell to pieces. Other than that it was nice if you like everything coated in sugar.

