b4icu- Here is a link to a interview with a amp designer. At the 22 minute mark he discusses they have designed a speaker cable that is the correct impedance for their Ion digital amplifier . Your statement above and now watching this video , this is the first I have ever heard anyone mention this . You are onto something here .
https://www.dagogo.com/exogal-interview/
https://www.dagogo.com/exogal-interview/