I've got a pair of Legacy Audio Legacy One's (superceded by Legacy Classic)....they are a little over 20 years old...I just replaced the woofer surrounds and was thinking about doing some upgrades...The cabinets are in great shape. I'm going to be moving in the next couple of years, so I don't want to buy anything new.
are you familiar with these?
I've worked with customers that have had various models from them in the past. The common thing that I have seen in those are pretty budget level parts, various colors of PVC jacketed common electrical wire, and a kris-cross of wiring and connections that look a bit like a rats nest.
I have pictures of some of them in my Legacy file folder.
There is a lot of up-side potential there if you want to go through them and upgrade the parts quality, wire, and connectors.
There are several ways to go about it and a lot of options as to how far to try and take them performance wise verses dollars spent. But that is one that I would consider replacing everything internally.