Two somewhat related points.
One, Terry's now-published review fails to mention that the Coda S5.5 supposedly runs 40W Class A into 4 ohms. As a user of 4 ohm Legacy speakers, which are known to have a couple of impedance dips, I ordered this amp for its high current, but am eager to learn whether I can hear the bias shifting into AB. The majority of my serious listening is done at average 85dB with peaks at 95.
Two, as for hearing: I also need hearing aids, and in fact could no longer appreciate hi-fi without them, but consider mine (ReSound) pretty junky despite high price. So, many thanks to @markmuse and @vinylvalet for recommending Widex. Ready for a change and hope these are the answer!