Experience With Vintage Magnavox?

They do ring, which might be a lot of what makes them sound so awful down in the 1.5K-3K octave. Up above that, maybe not so much? I should look at the impulse response to see. They never will be stellar, that's for sure. I've seen a few of the Heppners, but have owned only the Fosters.
I've tried wrapping those metal horns with rubber sheet, pads, electrical tape to dampen the "ring", it helps, but my ears just don't like them.