Difficult to judge as I haven’t had DSP5000’s for some time.

If improving your room acoustics is an option, I’d look at that first. If not, I’d either look at more power conditioning (you can never have enough, it seems!) or some AudioQuest cables for the coax (only naming them, because I used their cables myself, but would still suggest you consider this on a sale or return basis).

As I say, I’m not sure how much these upgrades will help, especially as AudioQuest Diamonds, for example, would be completely disproportionate for this system. That said, rewind back to when these systems were new and that these upgrades likely would have made a difference then - if you buy carefully second hand, it could still make a lot of sense.

Prolific music listener / Hi-Fi addict!