In 1977 I bought a pair of AR-10pi speakers paired with a Marantz 1150D amplifier ( I still use this amplifier). The system sounded great. Somewhere around 1995 I replaced the AR's subwoofers foam suspension. Last year (2021) I replaced all the speakers in the AR-10pi cabinets with replacements that I bought from simplyspeakers.com. The replacement speakers sound very good to me although I have heard comments that the subwoofer replacements are not up to par with the originals. I have, however, kept and carefully stored all the original speakers. The subwoofers foam suspension seem to be the weak point and they will need refoaming.
In 2009 I bought a set of Genelec studio speakers with a 10" sub and 2 active satellite speakers for my video studio. As soon as I heard them I said to myself "they sound just ike the AR's".