Hi rgreen,
Ohm started out as a "house brand" of speaker for a chain of stores in the Eastern US back in the 1970s. Ohm produced some very interesting speaker designs that had omnidirectional radiation, based on the Walsh driver. They were impressive in their time but were too costly. The Ohm "F" was probably the best known.
In later years, in my judgment, their designs did not keep pace with better speaker manufacturers. I last heard Ohm speakers in the mid-1990s, and they were nothing special then, but things may have changed. Depends who their designer is. Engineers move around (not at Axiom; the founder of the company still designs all the Axiom speakers).
Regards,
