Okay...it was the fuses! On both speakers!!! I initially looked at the fuses rather quickly to see the wire was intact. Yup. Did some more farting around. Nothing was working so I pulled the fuses again and pulled out my magnifying glass. Holy smokes - both fuses had broken wires inside but the breaks were so close to the metal ends that you barely tell they were out of commission. There were no spares in the lower part of the box so I took a quick trip to the hardware store to get new fuses. Voila...they really sound sooooo different with those high frequencies. I put Ella Sings Cole Porter on the ol' Technics 1200 and, to tell you the truth, I'm in ecstasy. Wonderful sound, folks. The ADS experience is pretty powerful so far...
Thanks to one and all...
Tony