Athena ML-1 Polyphasor : Any idea what this does?

Sounds like a similar idea to the modern TriPhazer.

Thank you Mgottlieb! That makes a lot of sense now, for the rca cables that are "built-in" to these boxes are about 28 ft. long going in, and about 2ft. long coming out on the "amp output" from them. I could see why, in theory, they might be used to "correct" for long runs to an amplifier. As Twl stated, they could be trying to address the same problems the TriPhazer attempts to do. The other gear that came with it all seems to be around 15 years old, and I would estimate the age of the ML-1 to be from the same era.... I appreciate your help!

Well, the only problem is, there were no cables built in to any model I ever saw. Of course, that means that it doubled your cable costs as well. Either this was a version done late in the production run, or a special order, or a do-it-yourself addition. I guess it's a bit like what future anthropologists will say about New York: don't know what it was for, or what it did, but looks interesting!