Autoformer versus Transformer Passives?

Your (previously my) K&K used S&B MkI transformers, not MkIII. The difference was the MkI version tended to sound a little warmer.

Working on getting the new Slagleman's. These are sold by Intact Audio. Sort of a "nude" version of a non-remote TAP-X. I'd like to compare them to my Lightspeed and hopefully can remember enough about the S&B MkI's to make a reasonable comparison. I'll let you know the results when I get them and have had enough time to listen.