Thaluza & racedoc. Thanks for verifying my observations. I haven't played around extensively with the loading. And I only have 100 & 470 ohm plugs at the time. I had more but apparently I sold them with the SUT which I sold several years ago. My Benz loved the 47K loading. So I will try it. Some albums are well suited for the 470 ohm. They hold the sound stage well and have a better air and larger sound stage. However, the 1st album I tried (Boston, "Don't Look Back" 1st pressing) sounded like the music was coming from everywhere on the front wall. The sound stage was huge. But there was no focus. FWIW, that album is recorded well.
I have some RCA plugs. I just need to find the resistors now. Got some of them somewhere too. The problem with being retired is that I have some of most everything yet I have a hard time tracking it down.