Recap them... I’ve have a number of the CS series, including the 99A’s (no 901’s though). Honestly (brutally honest), they all look much better than the sound, but the furniture appeal is truly there! That being said, they do tend to hold or appreciate in value, and if you recap them, they sound MUCH better - kind of like removing a blanket that has been covering them. Use decent poly caps, Dayton (Parts Express) or the like are reasonably priced for the application. Those super tweeters (same as used on the 99A’s) go bad occasionally. Use a paper towel tube to make sure each are functioning.
Hit them with some Howard’s and some furniture oil, and you’ve got an amazingly beautiful set of speakers. Hope you enjoy them!