Hi Red. Welcome.
I couldn't find any info on those speakers.
If they are 15 or more years old, chances are the foam surrounds are rotted.
The electrolytic caps get a little funky.
(funky is a technical electronics term)
Having all that repaired can be costly.
A DIY project will save you some.
The other problem, even if they are in perfect shape, finding a matching center channel, that will be a problem, or impossible.