Team Electronics was the chain of retail stores, owned by Dayton-Hudson (who owned Target, among others).
Their house brand of speakers was Atlantis (not Atlantic), and they added the Oracle moniker when they went upscale with the design. MSRP on the Oracle III was $279, and it was the best seller (and best sounding) of the four models. I found the IV to have some bass boom, as you've noted.
They later made a Visonik-inspired small speaker, the SA-1, with a cast cabinet, but with a larger cabinet and some mass loading on the driver for deeper bass.
Greg, it looks like the upper midrange and tweeter are not original, and have been replaced. They should be round, and not squared off, and they were all made by Becker.