The audio on the Eisenhower dedication, from what I've read on
this site, was 5 kHz telco audio - which would not be surprising, given its being recorded in Burbank. As for that sound, I've learned from
this page that the frequency response - or if you prefer, "bandwidth" - was 50 Hz - 5 kHz. In any event, it sure looked good for something 51 years old. And the picture looked rather coming from the TK-41, from what I've read of the varying quality from studio to studio.
Meanwhile, I was marveling at the replication of the color slides courtesy of the TK-26 film chain. I've understood that not even their 1960's TK-27 came close to this level, but GE's PE-24 and later PE-240 did that decade.