Given the Krells were made later, that is the only logical assumption. Unfortunately, the former owner that really purchased the gear is deceased, so we will never know the actual rationale for any of the purchases or what may or may not have been in the setup over the years. The wife, who I dealt with, really was not sure about any of the history. Not unlike most all situations like this for any other gear.
I logged in to denote that I returned the U-Haul and added 2,564 miles to it from end to end when I picked it up.
Road warrior! And that's one way, I believe?! If so, your round-trip is 4 times my longest trip for audio gear (around 1,350 miles round trip for me). Definitely worth it though! Enjoy.