I'm not so sure that TRL says that 500 hours is a magic number. IME, as one's music system gets better sounding, more changes are evident with break-in. If a system hasn't very much resolving power, one might not hear any change with break-in. So, some will hear differences with breaking-in a player or cable or... and, some won't notice a thing.
There's plenty of room for both camps in this crazy hobby.
Deb
There's plenty of room for both camps in this crazy hobby.
Deb