Barry, thank you for the YouTube link to Ormandy's Philadelphia M2.
Yes, the ending definitely is distorted, even on computer speakers. It has been many years since I've heard this recording, and listening only to the ending again, I seem to recall that even my LP copy also was distorted. This particular recording may or may not have been issued on open reel tape, for that format was still alive at that time, so there's no way for me to tell if the incarnation of that recording was distorted at the end.
Aside from Ormandy performing Mahler, to my mind and ears, his studio recordings in general never particularly revealed depth or imagination in performance. Of course, the Philadelphia Orchestra has always been an excellent instrument, well-balanced in all sections, and the players are as good as you can find anywhere. But the very few recordings I've heard of Ormandy in concert, seem to reveal him as an entirely different conductor - much better in that environment. The multi-CD centennial issue of historic recordings in concert made by the Philadelphia Orchestra seem to indicate that, as I recall, without going to my library to get out that set to cite specific examples.
The Herbert Kupferberg history of the Philadelphia Orchestra, Those Fabulous Philadelphians - The Life and Times of a Great Orchestra, though dated, and which I read as a "borrow" from a friend, indicated that Ormandy had a unique knack in making a recording. Whatever that was, it apparently was something that was satisfactory to Ormandy himself, as well as the recording teams he worked with. But to my ears, the issued product(s) reveal an unwillingness on the part of Ormandy to "take a chance" on delivering an interpretation of a particular work that might be different from other conductors and orchestras that recorded the same work. Yes, the recording will be well-played, but where or what is that unique thing that makes his recording of a particular work different from others? For some reason or another, when those recordings were issued on LP, they sold like hotcakes. But in today's CD age, you find few of Ormandy's Masterworks recordings in reissue, though a greater proportion of his later and fewer RCA recordings saw reissue.
Wade