This is the classic, monumental 1961 recording of Brahms's 'Ein deutsches Requiem' with Otto Klemperer and the Philharmonia Orchestra & Chorus on EMI, part of that label's recent batch of 96/24 remasterings of its back catalog. Downloaded from HDtracks. The graphs here (of the 2nd movement) look great, and they show that even 50-year-old analog tapes have a good deal of dynamics and frequency extension.
Russell