You might find that after many years the sound has deteriorated. The metal particals on tape will over time go back to there normal alignment. I have noticed this on all the tapes I ever made with my NAK 680ZX. After so many plays and just sitting around (even after 1 year)you can tell a big difference when you play the LP again and listen to an older tape you made with the same LP. They might be fun to listen to. Recording studios usally go thru a special process to keep the master tapes from deteriorating.
Joe Nies
Joe Nies