Went to search for the next selection and he says this:
"After sitting through a "top loader" UK pressing of The Beatles ("The White Album")—one of the first records I played through the Wavacs—I was left in awe. Objectively speaking, the bottom end was fuller than I'm used to and the top was somewhat on the mellow side, though not to the point of sounding muted or dull. It was as if the highest frequencies on this somewhat brash recording, which usually sounds ragged and somewhat aggressive, had been perfectly polished rather than lopped off. Everything that was supposed to be there was there, while everything you'd want removed was gone."
That tilted down response results in exactly that. Listening to the album it indeed has a harsh edge. I can fix that with EQ hell of a lot cheaper than putting in a colored amp that does that to every piece of music.