Stephens Trusonic was my first purchase of audiophile speakers, nearly fifty years ago. They were popular in the fifties and sixties, of excellent quality and very well regarded; similar to JBL but not quite as expensive. Mine were the 8 inch version of yours. They were known as full range drivers with the aluminum dust cap extending the range of the woofer to the mids and partial highs. Your caps must be somewhat dirty, possibly from a smoker's environment. If you decide to try and clean them be very careful because the aluminum is extremely easy to dint. On their own they were very good sounding but were designed for optimal performance to be mated with a Stephens tweeter.
Why your cabinets also have an unknown (at least to me) 8 inch driver does not make much sense, unless they are co-axial with built in tweeters. Even then it's a little 'different'. You'd be better off chucking the 8 inchers and try to find some Stephens tweeters (not very common) or substituting 16 ohm JBL 075 tweeters with an N2600 X-over network (Very Expensive).
So, unless you have a sentimental attachment to the speakers or enjoy tinkering with Vintage Gear, selling the Stephens on ebay to a Stephens enthusiast might be a better choice. Good luck with what ever you do.
Why your cabinets also have an unknown (at least to me) 8 inch driver does not make much sense, unless they are co-axial with built in tweeters. Even then it's a little 'different'. You'd be better off chucking the 8 inchers and try to find some Stephens tweeters (not very common) or substituting 16 ohm JBL 075 tweeters with an N2600 X-over network (Very Expensive).
So, unless you have a sentimental attachment to the speakers or enjoy tinkering with Vintage Gear, selling the Stephens on ebay to a Stephens enthusiast might be a better choice. Good luck with what ever you do.